City of Gridley

Butte County

Verified Aug. 4, 2026

City of Gridley is a city authority in the State of California, serving 7,421 residents. 545 residential solar installs are on record here. This page is the permit route for that jurisdiction: the fifteen steps from working out who has a say over an address through to permission to operate, the documents this authority publishes, and 62 answers taken from those documents and dated.

Permitting 5 steps · 28 questions

Whether a permit is needed — Yes. Butte County Code §26-102 requires a building permit for a small residential rooftop solar energy system, Q3 Electrical and building permits — Combined - a single permit. Butte County's Master Fee Schedule lists 'Photovoltaic System - Residential (Roof Mounted) $356' as one line under 'Electrical Permit… Q4 Plan review — For a standard roof-mount system: effectively none - it is processed over the counter with review happening at inspection. Q18 Where you file — Accela Citizen Access (ACA) - the Butte County Public Permit Portal at https://aca-prod.accela.com/BUTTECO/Default.aspx. Q20

Permit required
Yes. Butte County Code §26-102 requires a building permit for a small residential rooftop solar energy system,78% source
What it costs
$356 flat for a residential ROOF-mounted PV system (set by Butte County, which the City's own fee schedule confirms is the entity that 'establishes Inspection Fees'),82% source
Plan review turnaround
For a standard roof-mount system: effectively none - it is processed over the counter with review happening at inspection.70% source
Key document
published checklist cited by 5 open the document
  1. Confirm who has a say over your address

    A city address is usually permitted by the city, not the county — but not always, and some authorities keep building and hand electrical to someone else. Getting this wrong costs the whole submittal, because every requirement below belongs to whoever actually holds jurisdiction. Check the overlays in the same pass: an HOA, a historic district, a windstorm certification or a system-size cap can reshape the design, and all of them are cheaper to find now than after the array is laid out.

    • Is this authority the AHJ for residential solar at this address? No, not for building/electrical - that AHJ role belongs to Butte County Department of Development Services, Building Division, which has performed all building/electrical plan review, permit issuance and inspection for residential solar within Gridley city limits since 1 August 2017 under a City Council contract. The City of Gridley itself remains the authority for Planning/zoning review and for its own municipal electric utility's interconnection approval. 90% · fee schedule
    • What does this authority permit itself, and what does it delegate? Delegated. Building AND Electrical permitting/plan review/inspection are delegated wholly to Butte County Department of Development Services, Building Division (contract effective 8/1/2017). The City retains Planning/zoning review and, separately, its own municipal Electric Department's interconnection approval (a non-building gate unique to a municipal utility). Fire inspection fees and fire plan check are described in the City's own fee schedule as set by 'Butte County and Cal Fire', suggesting the regional CAL FIRE/Butte County Fire Marshal's office (not Gridley's own in-house suppression department) handles that function too, though this is less clearly stated than the building/electrical delegation. 85% · department page
    • Is a permit required for a residential rooftop PV system? Yes. Butte County Code §26-102 requires a building permit for a small residential rooftop solar energy system, and Butte County's own DBP-71 handout (which explicitly covers Gridley-located systems) lists 'Complete permit application' and 'Permit fee payment' as required at intake, with no exemption for solar in the County's exempt-work list. 78% · published checklist
    • Is there a separate electrical permit, or is it combined? Combined - a single permit. Butte County's Master Fee Schedule lists 'Photovoltaic System - Residential (Roof Mounted) $356' as one line under 'Electrical Permit Fees'; there is no separate building-permit fee line for the array itself. A service/panel upgrade, if needed, is a separate fee line ('Electrical Services, Residential ... under 400 amps, $312'). 75% · fee schedule
    • Is a HOA or architectural approval required first? No HOA/architectural approval requirement was found in any Gridley or Butte County solar document, and CA Gov. Code §65850.5 / Civil Code §714 bar conditioning an eligible small residential system's approval on HOA sign-off statewide. 60% · department page (absence) + state law
    • Is a wind or windstorm certification required? No. California has no windstorm-certification regime (that is a Texas/TDI concept). Butte County's own design-criteria document (DPC-05, which the Building Division uses for all permits it processes, including Gridley's) specifies wind design by ASCE 7-22 (87-105 mph depending on Risk Category, Exposure B or C) rather than a certificate. 60% · published checklist
    • Is a Specific Use Permit or Council approval ever required? Not for an eligible small residential rooftop system - CA Gov. Code §65850.5 makes that approval administrative and non-discretionary statewide, which would preempt a Council/SUP requirement for such a system in any California city including Gridley. Whether Gridley's own zoning code requires a Use Permit or Council approval for a LARGER or non-eligible system (e.g. height above the district limit, or a ground-mount array) could not be confirmed - Gridley's own zoning ordinance was not reachable this run. 55% · state statute + department page
    • Is there a system-size cap on residential generation? No Gridley-specific cap confirmed, but the statewide AB 2188 threshold of 10 kW AC / 30 kW thermal gates which residential systems qualify for the streamlined, single-inspection administrative permit under Gov. Code §65850.5 in any California jurisdiction, including Gridley. Separately, Gridley Electric's own Solar 2.0 program caps a customer's system at generating no more than 100% of the customer's own annual usage and at 1,000 kW capacity - a utility-side ceiling, not a building/zoning cap. 55% · utility FAQ page + state statute
  2. Check who is allowed to apply

    Several authorities require the electrical permit to be pulled by a licensed electrician, or require the contractor to be registered with them BEFORE applying. Registration is not same-day. This is second on the list rather than fourth because it is the step most likely to stop the job before the drawings matter.

    • Who is allowed to pull the electrical permit? Either - a licensed contractor, the property owner acting as Owner-Builder, or an authorized agent for either. 70% · published checklist
    • Must the contractor be registered with this authority before applying? Yes, for the utility side only. The City of Gridley Electric Department's own 'Customer Generation Application' has a required field for 'City Business License #' (with Date Applied / Date Issued / Expiration) for the Installer, meaning a contractor doing a Gridley interconnection must hold or obtain a City of Gridley business license. For the Butte County building/electrical permit itself, no separate County contractor-registration step is required beyond proof of a current CSLB license and Workers' Compensation insurance at issuance. 75% · department form
    • Is a homeowner permitted to self-install and self-permit? Yes. Owner-Builder self-permit is available through the Butte County process that governs Gridley addresses: the property owner may apply and sign as Owner-Builder (INF-03), completing an Owner's Acknowledgment and Verification of Information form that cannot be signed by an agent. 65% · published checklist
  3. Build the submittal package

    Almost everywhere wants a site plan, a one-line or three-line electrical diagram, equipment cut sheets with listings, and a structural attachment detail. Build it against the published checklist rather than the last jurisdiction you worked in — the checklist is what the reviewer marks against.

    • What documents make up a complete submittal? Per Butte County's DBP-71 (which explicitly names Gridley in its own text): complete permit application, permit fee payment, and a complete set of plans containing a cover sheet/site plan (job address, owner/contractor/designer contacts, description of work, panel count and system size in kW, applicable codes, site plan showing proposed and existing structures and utilities); electrical plans (main/sub-panel size and location, location of all electrical equipment, single-line diagram); and structural plans (proposed array location, racking plans with connection details, racking manufacturer's installation instructions). At inspection: a printed complete set of plans plus equipment specification sheets. If the array is going on a permitted 'Ag Exempt' structure, a structural-soundness letter from a CA-registered architect or engineer is additionally required. 82% · published checklist
    • How many copies, and in what format? Digital, no fixed copy count stated. Complete digital plans/documents are submitted at the Building Division counter, via Butte County's Ushare drop (www.bcdds.net/drop), or by email to dsbuilding@buttecounty.net. Approved digital plans are emailed back and the applicant must print them and keep the printed set on site for every inspection. 68% · published checklist
    • Is a site plan required, and what must it show? Yes. DBP-71 requires a site plan identifying the location of the proposed structure and all existing structures, plus the location of well, septic and other utilities. 75% · published checklist
    • Is a one-line / three-line diagram required? Yes - a single-line diagram is required ('Electrical Plans - identify size and location of main and sub-panels / location of all electrical equipment / single-line diagram showing all connections'). A three-line diagram is not requested. 78% · published checklist
    • Are string and conductor calculations required? No. Neither DBP-71 nor DBP-72 (Job Site Requirements for Residential Roof Mounted PV) asks for string sizing, voltage-drop, or conductor-ampacity calculations - the electrical deliverables are the single-line diagram, panel locations/sizes, and manufacturer spec sheets. Structural calculations are required only for ground mount, or where a roof-mount job exceeds the engineer-design thresholds in Q13. 65% · published checklist
    • Is a structural PE stamp required, and at what threshold? For a standard roof mount, no PE stamp - but engineer/architect DESIGN is required (and the job loses over-the-counter eligibility) if the panel/support framing exceeds 3.0 pounds per square foot, or the panel-to-roof-plane angle exceeds 30 degrees (40 degrees from horizontal); tilting and ballasted systems always require it. If the array sits on a permitted 'Ag Exempt' structure, a letter from a CA-registered architect or engineer stating the structure can carry the system is required. For GROUND mount, a stamp is effectively always required: site-specific foundation plans signed/stamped by a CA engineer or architect (or general plans plus a stamped site-specific review letter), plus structural calculations and anchoring details for equipment over 400 lb. 75% · published checklist
    • Is an electrical PE stamp required, and at what threshold? No electrical PE stamp requirement was found at any threshold. Every stamping/certification clause in DBP-69/70/71/72 attaches to the structure or foundation, never to the electrical design; plans need only be 'signed by their designer.' 60% · published checklist
  4. Apply and pay

    Most authorities now take the whole application through a portal, and several states cap or constrain what a residential solar permit may cost. Check whether plan check is billed separately before you quote the job.

    • Which permit portal does this authority use? Accela Citizen Access (ACA) - the Butte County Public Permit Portal at https://aca-prod.accela.com/BUTTECO/Default.aspx. Gridley's own Building Inspection Services page directs residents to the County's Development Services portal rather than to any City-run portal. Butte County does not offer SolarAPP+. 80% · department page
    • Can the whole application be completed online? Yes for the building/electrical permit (online applications, payments and inspection requests via Butte County's ACA portal after creating a public user account; in-person or email intake also offered). Separately, the utility side (Gridley Electric's Customer Generation Application and Interconnection Agreement) appears to be a paper/PDF form process, not an online portal submission - I found no online submission path for it. 65% · portal landing page
    • What does a residential solar permit cost? $356 flat for a residential ROOF-mounted PV system (set by Butte County, which the City's own fee schedule confirms is the entity that 'establishes Inspection Fees'), likely plus Butte County's standard 5% Technology Investment Fee surcharge (~$374 total). Related County lines: residential ground-mounted PV $1,274; residential battery/Power Wall $317; residential electrical service upgrade under 400A $312. Separately, the City of Gridley Electric Department charges its OWN utility interconnection review fee, additive to the building permit: $160 for systems ≤10 kW, $320 for systems >10 kW. 82% · fee schedule + department form
    • How is the fee calculated? Flat (building/electrical permit side) plus a separate tiered utility review fee. The Butte County building-permit fee is a fixed per-system amount ('Each'), not valuation- or per-kW-based. Gridley Electric's own interconnection review fee is two-tiered by system size: $160 at or under 10 kW, $320 above 10 kW. 78% · fee schedule + department form
    • Is there a separate plan-check fee? No, not for a standard roof-mount building permit - per DBP-71 the Building Inspector performs the plan review at the time of inspection rather than in the office, so the $356 fee is all-in. A true plan-check fee only appears for jobs that leave the over-the-counter track (e.g. ground mount, at $1,274, which is a real plan-review permit). 72% · published checklist
  5. Plan review — and start the utility in parallel

    Interconnection is a separate process from the permit and usually the longer pole. Where the utility does not depend on the permit being issued, running both at once is the single biggest saving available on a residential job.

    • What is the stated plan-review turnaround? For a standard roof-mount system: effectively none - it is processed over the counter with review happening at inspection. For anything routed into full plan review (ground mount, oversized, tilted/ballasted systems), Butte County's own live 'Plans Being Checked Today' table on its Building Division page showed, on the date checked, 'Ground Mounted & Non-Residential Roof Mounted Solar' submissions currently under review dated '3 weeks ago' and re-checks '2 weeks ago' - i.e. roughly 15 business days for a first review. 70% · department page
    • How long is an issued permit valid before it expires? Reported (not independently re-verified this run): one year from issuance, per Butte County Code §26-3.1 (amending CBC §105.5), with a renewal window of 30 days after expiry if no plan changes were made; INF-11 (Butte County) reportedly states that non-structural permits including electrical do not qualify for renewal. 45% · ordinance (not independently re-verified this run)
    • Which utility handles interconnection here? City of Gridley Electric Department - a municipally-owned electric utility (established 1910, organized under California's Municipal Utility Act, Pub. Util. Code §11501 et seq.), NOT Pacific Gas & Electric. This is a correction against the common assumption that PG&E serves this ZIP: Gridley operates its own generation-interconnection program ('Solar 2.0') and its own Interconnection Agreement, entirely separate from PG&E and from CPUC Rule 21. 95% · utility interconnection agreement
    • Where does the utility sit in the sequence? Before permit, for the interconnection review step; parallel/mutually-gating thereafter. Gridley Electric reviews and approves the Customer Generation Application FIRST - the application's own staff-use approval block states the reviewed/approved system 'authorizes submission of plans to the Butte County Department of Development Services Building Division for permit issuance.' The signed Interconnection Agreement (§4.3-4.5) then requires the customer to submit equipment specs/plans to the City for written approval BEFORE installation, obtain the Butte County permit, and NOT commence parallel operation until BOTH the City's written interconnection approval AND the Butte County permit/inspection have been obtained. 85% · utility interconnection agreement

28 questions answered against City of Gridley’s own published documents

Q1 Is this authority the AHJ for residential solar at this address? Core Jurisdiction & scope

No, not for building/electrical - that AHJ role belongs to Butte County Department of Development Services, Building Division, which has performed all building/electrical plan review, permit issuance and inspection for residential solar within Gridley city limits since 1 August 2017 under a City Council contract. The City of Gridley itself remains the authority for Planning/zoning review and for its own municipal electric utility's interconnection approval.

Why the confidence is not higherDirectly stated in the City's own Master Fee Schedule ('Effective August 1, 2017, the City of Gridley City Council contracted with the County of Butte to provide Building Inspections services within the City of Gridley') and the City's own Building Inspection Services page ('Building Inspections Services are now performed by the Butte County Department of Development Services Building Division').

fee schedule checked 2026-08-31 https://www.gridleyca.gov/DocumentCenter/View/182/Master-Fee-Schedule-PDF

Q2 What does this authority permit itself, and what does it delegate? Core Jurisdiction & scope

Delegated. Building AND Electrical permitting/plan review/inspection are delegated wholly to Butte County Department of Development Services, Building Division (contract effective 8/1/2017). The City retains Planning/zoning review and, separately, its own municipal Electric Department's interconnection approval (a non-building gate unique to a municipal utility). Fire inspection fees and fire plan check are described in the City's own fee schedule as set by 'Butte County and Cal Fire', suggesting the regional CAL FIRE/Butte County Fire Marshal's office (not Gridley's own in-house suppression department) handles that function too, though this is less clearly stated than the building/electrical delegation.

Why the confidence is not higherCity's own Master Fee Schedule and Building Inspection Services page (as in Q1); Butte County's own DBP-70/DBP-71 solar handouts (downloaded and read with pdftotext) route Gridley applicants to City Planning only, consistent with Building/Electrical being processed by the County directly.

department page checked 2026-08-31 https://www.gridleyca.gov/183/Building-Inspection-Services

Q3 Is a permit required for a residential rooftop PV system? Core Jurisdiction & scope

Yes. Butte County Code §26-102 requires a building permit for a small residential rooftop solar energy system, and Butte County's own DBP-71 handout (which explicitly covers Gridley-located systems) lists 'Complete permit application' and 'Permit fee payment' as required at intake, with no exemption for solar in the County's exempt-work list.

Why the confidence is not higherDBP-71 (downloaded and extracted myself with pdftotext, revision stamp 2/19/26) requires an application and fee for a Gridley-located roof-mount PV system. I could not independently reach Butte County Code §26-102 itself on this run (codelibrary.amlegal.com blocked by Cloudflare), so this rests on the County's own current handout rather than the ordinance text directly, hence not scored higher.

published checklist checked 2026-08-31 https://www.buttecounty.net/DocumentCenter/View/3147/DBP-71-Residential-Roof-Mount-Solar-System-PDF

Q4 Is there a separate electrical permit, or is it combined? Core Jurisdiction & scope

Combined - a single permit. Butte County's Master Fee Schedule lists 'Photovoltaic System - Residential (Roof Mounted) $356' as one line under 'Electrical Permit Fees'; there is no separate building-permit fee line for the array itself. A service/panel upgrade, if needed, is a separate fee line ('Electrical Services, Residential ... under 400 amps, $312').

Why the confidence is not higherButte County Master Fee Schedule (effective 1 Oct 2025), downloaded and extracted myself with pdftotext, section C 'Electrical Permit Fees', item 6 'Photovoltaic System - Residential'. Confidence reflects that this is the County's schedule and I could not find a Gridley-specific statement that the same single-permit structure applies verbatim to Gridley addresses, though the delegation of the whole function makes this the reasonable read.

fee schedule checked 2026-08-31 https://www.buttecounty.net/DocumentCenter/View/1549/Master-Fee-Schedule-PDF

Q5 Who is allowed to pull the electrical permit? Core Who may apply

Either - a licensed contractor, the property owner acting as Owner-Builder, or an authorized agent for either.

Why the confidence is not higherButte County's INF-03 'Who Can Apply and Sign for a Building Permit' (downloaded and extracted myself with pdftotext) states permits may be applied for by the property owner as Owner-Builder, an authorized agent for the owner, licensed contractors, or an authorized agent for the licensed contractor. This is the County's general rule, applied here to Gridley on the basis that Butte County performs all building/electrical permitting for Gridley addresses; I found no Gridley-specific carve-out.

published checklist checked 2026-08-31 https://www.buttecounty.net/DocumentCenter/View/9616/INF-03-Who-Can-Apply-for-Permits-PDF

Q6 Must the contractor be registered with this authority before applying? Core Who may apply

Yes, for the utility side only. The City of Gridley Electric Department's own 'Customer Generation Application' has a required field for 'City Business License #' (with Date Applied / Date Issued / Expiration) for the Installer, meaning a contractor doing a Gridley interconnection must hold or obtain a City of Gridley business license. For the Butte County building/electrical permit itself, no separate County contractor-registration step is required beyond proof of a current CSLB license and Workers' Compensation insurance at issuance.

Why the confidence is not higherGridley Electric's own 'Customer Generation Application' PDF (downloaded and read myself) carries the City Business License field on its Installer Information block. The building-permit-side negative is Butte County's general rule per INF-03/DBP-70's 'Permit Issuance' list, which names only license/insurance proof, not registration.

department form checked 2026-08-31 https://www.gridleyca.gov/DocumentCenter/View/247

Q7 Is a homeowner permitted to self-install and self-permit? Who may apply

Yes. Owner-Builder self-permit is available through the Butte County process that governs Gridley addresses: the property owner may apply and sign as Owner-Builder (INF-03), completing an Owner's Acknowledgment and Verification of Information form that cannot be signed by an agent.

Why the confidence is not higherButte County's INF-03, downloaded and read myself, describes the Owner-Builder path in general terms (not solar-specific) as applying to any building permit the County issues, including those for Gridley addresses under the delegation arrangement.

published checklist checked 2026-08-31 https://www.buttecounty.net/DocumentCenter/View/9616/INF-03-Who-Can-Apply-for-Permits-PDF

Q8 What documents make up a complete submittal? Core Submittal package

Per Butte County's DBP-71 (which explicitly names Gridley in its own text): complete permit application, permit fee payment, and a complete set of plans containing a cover sheet/site plan (job address, owner/contractor/designer contacts, description of work, panel count and system size in kW, applicable codes, site plan showing proposed and existing structures and utilities); electrical plans (main/sub-panel size and location, location of all electrical equipment, single-line diagram); and structural plans (proposed array location, racking plans with connection details, racking manufacturer's installation instructions). At inspection: a printed complete set of plans plus equipment specification sheets. If the array is going on a permitted 'Ag Exempt' structure, a structural-soundness letter from a CA-registered architect or engineer is additionally required.

Why the confidence is not higherDBP-71 'Residential Roof Mounted PV Solar Systems' (Revised 2/19/26), downloaded and extracted myself with pdftotext; this document names Gridley by name in its Planning-referral note, so it is demonstrably the document Gridley applicants are given.

published checklist checked 2026-08-31 https://www.buttecounty.net/DocumentCenter/View/3147/DBP-71-Residential-Roof-Mount-Solar-System-PDF

Q9 How many copies, and in what format? Submittal package

Digital, no fixed copy count stated. Complete digital plans/documents are submitted at the Building Division counter, via Butte County's Ushare drop (www.bcdds.net/drop), or by email to dsbuilding@buttecounty.net. Approved digital plans are emailed back and the applicant must print them and keep the printed set on site for every inspection.

Why the confidence is not higherButte County's DBP-70 (Ground Mounted PV, which also names Gridley), downloaded and read myself, gives these channels and the print-for-inspection rule; DBP-71 repeats the 'printed complete set of plans' requirement at inspection. Neither document states a specific number of copies.

published checklist checked 2026-08-31 https://www.buttecounty.net/DocumentCenter/View/3146/DBP-70-Ground-Mount-Solar-Systems-PDF

Q10 Is a site plan required, and what must it show? Core Submittal package

Yes. DBP-71 requires a site plan identifying the location of the proposed structure and all existing structures, plus the location of well, septic and other utilities.

Why the confidence is not higherDBP-71, downloaded and read myself, 'Minimum Plan Requirements - Cover Sheet and/or Site Plan'.

published checklist checked 2026-08-31 https://www.buttecounty.net/DocumentCenter/View/3147/DBP-71-Residential-Roof-Mount-Solar-System-PDF

Q11 Is a one-line / three-line diagram required? Core Drawings & calculations

Yes - a single-line diagram is required ('Electrical Plans - identify size and location of main and sub-panels / location of all electrical equipment / single-line diagram showing all connections'). A three-line diagram is not requested.

Why the confidence is not higherDBP-71, downloaded and read myself, Minimum Plan Requirements - Electrical.

published checklist checked 2026-08-31 https://www.buttecounty.net/DocumentCenter/View/3147/DBP-71-Residential-Roof-Mount-Solar-System-PDF

Q12 Are string and conductor calculations required? Drawings & calculations

No. Neither DBP-71 nor DBP-72 (Job Site Requirements for Residential Roof Mounted PV) asks for string sizing, voltage-drop, or conductor-ampacity calculations - the electrical deliverables are the single-line diagram, panel locations/sizes, and manufacturer spec sheets. Structural calculations are required only for ground mount, or where a roof-mount job exceeds the engineer-design thresholds in Q13.

Why the confidence is not higherAbsence checked directly in DBP-71 and DBP-72 (both downloaded and read in full by me); neither contains the words 'calculation', 'ampacity' or 'conductor sizing' in an electrical-design context. Positive control 'roof' and 'panel' both hit multiple times in each document; fabricated control 'zzqqx' zero hits.

published checklist checked 2026-08-31 https://www.buttecounty.net/DocumentCenter/View/3148/DBP-72-Job-Site-Requirements-for-Online-Roof-Mount-Solar-PDF

Q13 Is a structural PE stamp required, and at what threshold? Core Engineering & stamps

For a standard roof mount, no PE stamp - but engineer/architect DESIGN is required (and the job loses over-the-counter eligibility) if the panel/support framing exceeds 3.0 pounds per square foot, or the panel-to-roof-plane angle exceeds 30 degrees (40 degrees from horizontal); tilting and ballasted systems always require it. If the array sits on a permitted 'Ag Exempt' structure, a letter from a CA-registered architect or engineer stating the structure can carry the system is required. For GROUND mount, a stamp is effectively always required: site-specific foundation plans signed/stamped by a CA engineer or architect (or general plans plus a stamped site-specific review letter), plus structural calculations and anchoring details for equipment over 400 lb.

Why the confidence is not higherDBP-71, DBP-72 and DBP-70, all downloaded and read in full myself. DBP-72 states in terms: 'Engineer or architect design is required and the project is not eligible for online application.'

published checklist checked 2026-08-31 https://www.buttecounty.net/DocumentCenter/View/3148/DBP-72-Job-Site-Requirements-for-Online-Roof-Mount-Solar-PDF

Q14 Is an electrical PE stamp required, and at what threshold? Engineering & stamps

No electrical PE stamp requirement was found at any threshold. Every stamping/certification clause in DBP-69/70/71/72 attaches to the structure or foundation, never to the electrical design; plans need only be 'signed by their designer.'

Why the confidence is not higherAbsence proved by reading DBP-69, DBP-70, DBP-71 and DBP-72 in full, myself, after pdftotext extraction.

published checklist checked 2026-08-31 https://www.buttecounty.net/DocumentCenter/View/3146/DBP-70-Ground-Mount-Solar-Systems-PDF

Q15 What does a residential solar permit cost? Core Fees

$356 flat for a residential ROOF-mounted PV system (set by Butte County, which the City's own fee schedule confirms is the entity that 'establishes Inspection Fees'), likely plus Butte County's standard 5% Technology Investment Fee surcharge (~$374 total). Related County lines: residential ground-mounted PV $1,274; residential battery/Power Wall $317; residential electrical service upgrade under 400A $312. Separately, the City of Gridley Electric Department charges its OWN utility interconnection review fee, additive to the building permit: $160 for systems ≤10 kW, $320 for systems >10 kW.

Why the confidence is not higherButte County Master Fee Schedule (effective 1 Oct 2025, downloaded and extracted myself) for the building-permit-side figures; the City's own Master Fee Schedule for the sentence confirming the County sets these fees for Gridley; Gridley's own 'Customer Generation Application' PDF (downloaded and read myself) for the utility review fee, which is a genuinely separate, additive cost unique to Gridley's municipal utility.

fee schedule + department form checked 2026-08-31 https://www.gridleyca.gov/DocumentCenter/View/247

Q16 How is the fee calculated? Core Fees

Flat (building/electrical permit side) plus a separate tiered utility review fee. The Butte County building-permit fee is a fixed per-system amount ('Each'), not valuation- or per-kW-based. Gridley Electric's own interconnection review fee is two-tiered by system size: $160 at or under 10 kW, $320 above 10 kW.

Why the confidence is not higherButte County Master Fee Schedule (Unit column reads 'Each' for the PV lines), downloaded and extracted myself; Gridley's own Customer Generation Application for the utility-side tiering.

fee schedule + department form checked 2026-08-31 https://www.gridleyca.gov/DocumentCenter/View/247

Q17 Is there a separate plan-check fee? Fees

No, not for a standard roof-mount building permit - per DBP-71 the Building Inspector performs the plan review at the time of inspection rather than in the office, so the $356 fee is all-in. A true plan-check fee only appears for jobs that leave the over-the-counter track (e.g. ground mount, at $1,274, which is a real plan-review permit).

Why the confidence is not higherDBP-71, downloaded and read myself: 'The Building Inspector will perform a plan review on the plans during the inspection, unless if the system falls under one of the items listed below requiring a full plan review.'

published checklist checked 2026-08-31 https://www.buttecounty.net/DocumentCenter/View/3147/DBP-71-Residential-Roof-Mount-Solar-System-PDF

Q18 What is the stated plan-review turnaround? Core Timeline & validity

For a standard roof-mount system: effectively none - it is processed over the counter with review happening at inspection. For anything routed into full plan review (ground mount, oversized, tilted/ballasted systems), Butte County's own live 'Plans Being Checked Today' table on its Building Division page showed, on the date checked, 'Ground Mounted & Non-Residential Roof Mounted Solar' submissions currently under review dated '3 weeks ago' and re-checks '2 weeks ago' - i.e. roughly 15 business days for a first review.

Why the confidence is not higherI fetched the Butte County Building Division page myself on the checked_on date and read the live plan-check status table directly (not summarized); DBP-71 states the OTC review-at-inspection mechanism.

department page checked 2026-08-31 https://www.buttecounty.net/252/Building

Q19 How long is an issued permit valid before it expires? Timeline & validity

Reported (not independently re-verified this run): one year from issuance, per Butte County Code §26-3.1 (amending CBC §105.5), with a renewal window of 30 days after expiry if no plan changes were made; INF-11 (Butte County) reportedly states that non-structural permits including electrical do not qualify for renewal.

Why the confidence is not higherI could not reach codelibrary.amlegal.com/codes/butte_county on this run (Cloudflare 403, both via curl with the recommended Referer header and via the fetch tool), so I cannot independently confirm the ordinance text myself this run. This figure is reported here at reduced confidence because it is corroborated by a companion Butte County research file (checked_on 2026-08-28, three days prior) that did successfully reach the ordinance. Recording it rather than omitting it because it is directly relevant and plausible, but it should be re-verified against the ordinance text when amlegal is reachable.

ordinance (not independently re-verified this run) checked 2026-08-31 https://library.municode.com/ca/butte_county/codes/code_of_ordinances?nodeId=CH26BU_ARTIINGE

Q20 Which permit portal does this authority use? Core Portal & process

Accela Citizen Access (ACA) - the Butte County Public Permit Portal at https://aca-prod.accela.com/BUTTECO/Default.aspx. Gridley's own Building Inspection Services page directs residents to the County's Development Services portal rather than to any City-run portal. Butte County does not offer SolarAPP+.

Why the confidence is not higherGridley's own Building Inspection Services page ('The county offers a wide array of inspection services and permits online through their Development Services portal'); Butte County's own Online Permit Portal page, which I fetched myself, names Accela ACA and confirms no SolarAPP+ reference on the County site.

department page checked 2026-08-31 https://www.gridleyca.gov/183/Building-Inspection-Services

Q21 Can the whole application be completed online? Core Portal & process

Yes for the building/electrical permit (online applications, payments and inspection requests via Butte County's ACA portal after creating a public user account; in-person or email intake also offered). Separately, the utility side (Gridley Electric's Customer Generation Application and Interconnection Agreement) appears to be a paper/PDF form process, not an online portal submission - I found no online submission path for it.

Why the confidence is not higherButte County's Online Permit Portal page, fetched myself, for the building-permit-side answer; Gridley's Customer Generation Application and Interconnection Agreement (both downloaded and read by me) are fillable PDF forms with signature blocks and no stated online-submission mechanism, which is why I answer only partially Yes.

portal landing page checked 2026-08-31 https://www.buttecounty.net/2171/Online-Permit-Portal

Q22 Which utility handles interconnection here? Core Utility interconnection

City of Gridley Electric Department - a municipally-owned electric utility (established 1910, organized under California's Municipal Utility Act, Pub. Util. Code §11501 et seq.), NOT Pacific Gas & Electric. This is a correction against the common assumption that PG&E serves this ZIP: Gridley operates its own generation-interconnection program ('Solar 2.0') and its own Interconnection Agreement, entirely separate from PG&E and from CPUC Rule 21.

Why the confidence is not higherConfirmed from four independent City-published sources I downloaded/read myself: the Electric Department page, the Solar 2.0 FAQ page, the City's own Customer Generation Application form, and the City's own Interconnection Agreement (recitals: 'The City of Gridley Electric Utility is a municipal utility organized under California's Municipal Utility Act ... and provides retail electrical service to its customers located within Gridley'). Butte County's own DBP-18 Electric Service Questionnaire independently corroborates this, asking 'Have you contacted the electric utility (PG&E, Gridley Electric)?'

utility interconnection agreement checked 2026-08-31 https://www.gridleyca.gov/DocumentCenter/View/246

Q23 Where does the utility sit in the sequence? Core Utility interconnection

Before permit, for the interconnection review step; parallel/mutually-gating thereafter. Gridley Electric reviews and approves the Customer Generation Application FIRST - the application's own staff-use approval block states the reviewed/approved system 'authorizes submission of plans to the Butte County Department of Development Services Building Division for permit issuance.' The signed Interconnection Agreement (§4.3-4.5) then requires the customer to submit equipment specs/plans to the City for written approval BEFORE installation, obtain the Butte County permit, and NOT commence parallel operation until BOTH the City's written interconnection approval AND the Butte County permit/inspection have been obtained.

Why the confidence is not higherBoth the Gridley Electric Customer Generation Application and the City of Gridley Electric Utility Interconnection Agreement (Updated 8/25/2021) were downloaded and read in full by me; the sequencing language quoted is verbatim from each document.

utility interconnection agreement checked 2026-08-31 https://www.gridleyca.gov/DocumentCenter/View/246

Q24 Is a HOA or architectural approval required first? Overlays & special cases

No HOA/architectural approval requirement was found in any Gridley or Butte County solar document, and CA Gov. Code §65850.5 / Civil Code §714 bar conditioning an eligible small residential system's approval on HOA sign-off statewide.

Why the confidence is not higherAbsence checked in DBP-70/71/72, the Gridley Electric application/agreement, and Gridley's Planning Services page - none mentions HOA or architectural review. I could not check Gridley's own zoning ordinance text directly (amlegal blocked), so this rests on the state-law floor plus the absence in the documents I could reach, not on a Gridley-specific ordinance statement.

department page (absence) + state law checked 2026-08-31 https://www.gridleyca.gov/173/Planning-Services

Q25 Is there a historic-district review? Overlays & special cases

Nothing published by this authority.

Where we lookedGridley's own Planning Services page (no historic-district or design-review content found); attempted Gridley's own municipal/zoning code at codelibrary.amlegal.com/codes/gridley (403 Cloudflare bot challenge on every attempt this run, via curl with the recommended Referer header and via the fetch tool); Documents & Forms page has no zoning ordinance, historic-overlay map, or design-review document listed.

https://www.gridleyca.gov/173/Planning-Services

Q26 Is a wind or windstorm certification required? Overlays & special cases

No. California has no windstorm-certification regime (that is a Texas/TDI concept). Butte County's own design-criteria document (DPC-05, which the Building Division uses for all permits it processes, including Gridley's) specifies wind design by ASCE 7-22 (87-105 mph depending on Risk Category, Exposure B or C) rather than a certificate.

Why the confidence is not higherDPC-05 'Building Design Criteria', downloaded and read in full by me. Extended to Gridley on the basis that the County applies the same design-criteria document to every permit it processes under the delegation, which is not separately confirmed for Gridley in the document itself.

published checklist checked 2026-08-31 https://www.buttecounty.net/DocumentCenter/View/7553/DPC-05-Building-Design-Criteria---CBC-2025-PDF

Q27 Is a Specific Use Permit or Council approval ever required? Overlays & special cases

Not for an eligible small residential rooftop system - CA Gov. Code §65850.5 makes that approval administrative and non-discretionary statewide, which would preempt a Council/SUP requirement for such a system in any California city including Gridley. Whether Gridley's own zoning code requires a Use Permit or Council approval for a LARGER or non-eligible system (e.g. height above the district limit, or a ground-mount array) could not be confirmed - Gridley's own zoning ordinance was not reachable this run.

Why the confidence is not higherGov. Code §65850.5 is a state-law floor applicable regardless of local zoning text. The Gridley-specific half of the question is unresolved because codelibrary.amlegal.com/codes/gridley (where the City's own municipal/zoning code is hosted, per the City's Documents & Forms page) returned a 403 Cloudflare bot challenge on every attempt this run, both via curl with the recommended Referer header and via the fetch tool.

state statute + department page checked 2026-08-31 https://www.gridleyca.gov/201/Documents-Forms

Q28 Is there a system-size cap on residential generation? Overlays & special cases

No Gridley-specific cap confirmed, but the statewide AB 2188 threshold of 10 kW AC / 30 kW thermal gates which residential systems qualify for the streamlined, single-inspection administrative permit under Gov. Code §65850.5 in any California jurisdiction, including Gridley. Separately, Gridley Electric's own Solar 2.0 program caps a customer's system at generating no more than 100% of the customer's own annual usage and at 1,000 kW capacity - a utility-side ceiling, not a building/zoning cap.

Why the confidence is not higherGov. Code §65850.5's 10 kW AC/30 kW thermal threshold is state law; Gridley's own Solar 2.0 FAQ page (fetched myself) states the 100%-of-usage and 1,000 kW utility program limits explicitly. I could not confirm whether Gridley's own zoning code adds any further generation-size or height cap, for the same amlegal-access reason as Q27.

utility FAQ page + state statute checked 2026-08-31 https://www.gridleyca.gov/Faq.aspx?TID=19

Lines marked with a percentage were read off this authority’s own published documents. Unmarked guidance is general good practice, not this jurisdiction’s rule — always confirm against the authority before you submit.

Install 5 steps · 20 questions
  1. Build to the code editions actually in force here

    The NEC edition a jurisdiction enforces is often a cycle behind the newest one published, and local amendments sit on top of it. Rapid shutdown, conductor sizing and labelling all change between editions, so the edition in force is the first thing to establish, not the last.

    • Which NEC edition is in force? 2023 NEC, in force as the 2025 California Electrical Code (Title 24, Part 3). Butte County's own current design-criteria document (DPC-05), which the Building Division applies to the permits it processes for Gridley, lists '2025 California Electrical Code (CEC)' among the codes in force. 72% · published checklist
    • Which building code edition is in force? 2025 California Building Code and 2025 California Residential Code (Title 24, Parts 2 and 2.5), per the same Butte County DPC-05 design-criteria document applied to Gridley permits. 72% · published checklist
    • Which fire code edition is in force? Likely the 2025 California Fire Code (Title 24, Part 9), per DPC-05's current-codes list, but the enforcing agency for Gridley is genuinely unclear: Gridley operates its own combination fire department (CAL FIRE-staffed since 1991) separate from the 'CAL FIRE/Butte County Fire Department' Office of the Fire Marshal that reviews plans for the unincorporated county, yet the City's own fee schedule attributes Gridley's fire plan-check fee-setting to 'Butte County and Cal Fire' jointly. 45% · fee schedule (ambiguous enforcement) + published checklist
    • What is the installation judged against? The 2025 California Electrical Code (2023 NEC) Article 690/705, applied together with Butte County's own field guide DBP-69 'Photovoltaic Inspection Guidelines - Residential Interactive Systems' and the UL-listing requirement in DBP-72 ('Installation shall conform to the California Electric Code (CEC) Article 690, Solar Photovoltaic Systems. All equipment and components shall be listed and labeled by Underwriters Laboratories or other recognized agency'). CAUTION: DBP-69 itself still cites 2016 CEC article numbers throughout (last revised 4/10/18) even though the code actually in force is the 2023 NEC cycle. 68% · published checklist
  2. Fire access, setbacks and pathways

    Ridge setbacks and roof access pathways are fire-service requirements and they constrain the array layout. They are the most common cause of a redesign after the fire department comments on a plan set.

    • What ridge setback and access pathways are required? Not confirmed for a Gridley-specific amendment. The unamended 2025 California Fire Code §1205 and California Residential Code R329 (statewide ridge-setback/pathway/rapid-shutdown-marking rules for 1-2 family dwellings) would apply by default if no local amendment exists, but I could not confirm whether Gridley's own fire code (as opposed to the unincorporated county's) carries any local pathway/setback amendment, given the fire-enforcement ambiguity described in Q31 and my inability to reach Gridley's own code. 40% · published checklist (absence) + state code default
  3. Rapid shutdown

    Which rapid-shutdown rule applies follows directly from the NEC edition in force, and the initiation device has to be at a location the fire service can reach and identify. This is inspected, and it is labelled.

    • Is rapid shutdown required, and to which NEC edition? Yes - required, to the 2023 NEC (§690.12) as adopted in the 2025 CEC. Butte County's own field guide DBP-69, used for Gridley inspections, requires it explicitly: 'Photovoltaic systems located on or in a building shall include a Rapid Shutdown system'; 'Rapid Shutdown Equipment shall be listed and identified'; 'Controlled Conductors are limited to maximum 30 Volts and 240 Volt-Amps within 10 seconds of Rapid Shutdown initiation'; and the inspector verifies the permanent plaque reading 'PHOTOVOLTAIC SYSTEM EQUIPPED WITH RAPID SHUTDOWN'. Caveat: DBP-69 states this against the 2016 CEC citation (690.12/690.56(C)); the enforceable text today is the 2023 NEC. 72% · published checklist
  4. Labels and placards

    The NEC sets a baseline for permanent markings at the service equipment and the disconnecting means. On top of that, an authority may specify its own wording, and the utility may specify more again. Where any of them writes its own text, a generic off-the-shelf label set will not pass — this is the detail most often fixed on a return visit.

    • Which placards does this authority require at the service equipment? Per DBP-69: on the AC disconnect, permanent ID of maximum AC output and operating AC voltage; where the DC disconnect/inverter/AC disconnect is not at the utility service panel, a permanent plaque on the utility panel naming the other equipment's location; the rapid-shutdown plaque/directory at the utility service; the DC disconnect labelled 'PHOTOVOLTAIC DC DISCONNECT' plus a shock-hazard warning and installed-system values (rated max power-point current/voltage, max system voltage, short-circuit current); and DC junction boxes run through the building labelled 'DC SOURCE CIRCUITS'. Rooftop micro-inverter systems (no DC disconnect) get the Installed System Information on the utility service panel instead. 72% · published checklist
    • Does the authority specify placard wording of its own? No - the wording Butte County publishes (and applies to Gridley inspections) is the NEC's own standard wording, not an authority-invented text. DBP-69 reproduces strings like 'PHOTOVOLTAIC DC DISCONNECT', the shock-hazard warning, 'PHOTOVOLTAIC SYSTEM EQUIPPED WITH RAPID SHUTDOWN' and 'DC SOURCE CIRCUITS', each tied to a CEC article citation. No Gridley- or Butte-invented placard text was found. 70% · published checklist
    • Does it specify letter height, colour or material? No letter height, colour or material is specified by DBP-69 (it only requires labels be 'proper and permanent') and Gridley Electric publishes no equivalent to a utility 'Greenbook' labeling spec in the two documents I obtained (Customer Generation Application, Interconnection Agreement). Default is the 2023 NEC's own general marking/durability standard. 55% · published checklist (absence)
    • Is a site plan / facility map placard required, and what must it show? Yes in substance. DBP-69 requires that where the DC disconnect, inverter and/or AC disconnect are NOT at the utility service panel, 'a permanent Plaque shall be installed on the Utility Panel identifying the location(s) of the other equipment' - a location-directory placard, corresponding to 2023 NEC §705.10/690.56. I found no Gridley Electric-specific site-plan/facility-map placard requirement beyond this. 65% · published checklist
    • Where must the labels be placed? Per DBP-69: on the DC disconnect (readily accessible, within sight of the inverter); on the AC disconnect; on the utility service panel where other equipment is remote from it (and for the Installed System Information on micro-inverter systems); and on DC-circuit junction boxes run through the building. Placement standards specific to Gridley Electric's own equipment (e.g. a utility-side AC disconnect switch) were not found in the two Gridley Electric documents obtained. 62% · published checklist
  5. Disconnect, storage and listed equipment

    Where the AC disconnect must sit relative to the meter is usually the utility's rule, not the building department's. Battery storage frequently carries its own permit, its own inspection and its own fire conditions.

    • Must equipment be on a specific approved list? Yes - listing, not a Gridley- or Butte-specific approved-products roster. DBP-72: 'All equipment and components shall be listed and labeled by Underwriters Laboratories or other recognized agency.' 75% · published checklist
    • Are batteries permitted, and under what conditions? Yes, permitted, under the state codes (2025 CRC/CFC energy-storage provisions) as applied via Butte County's process. Butte County treats a battery as a chargeable per-system electrical item ('Power Walls - Batteries Per System: Residential $317'), which indicates routine permitting rather than prohibition; no Gridley- or Butte-specific ESS handout or additional condition was found. 55% · fee schedule
    • Is a ground mount treated as a structure? Yes - Butte County treats a residential ground-mount array as a structure requiring full plan review, not an over-the-counter permit: fee $1,274 (vs. $356 roof mount), with site-specific foundation plans stamped by a CA engineer/architect, structural calculations and anchoring details for equipment over 400 lb, and a Geotechnical report where applicable. DBP-70 also separately requires the Gridley applicant to contact City Planning 'for land use and setbacks prior to submittal of plans' - meaning Gridley's own zoning, not the County's, governs setback/placement for a ground-mount system within city limits. 70% · published checklist + fee schedule
    • Is there a local rule on service upgrades or busbar sizing? Yes - a 20% backfeed/busbar rule. DBP-69 states: 'Photovoltaic interconnection circuit breaker at the Utility Service Panel shall not exceed 20% of the bussing rating and shall be positioned at the opposite end of the bussing from the main input circuit location (i.e. 20 amp for 100 amp panel)' (cited to 2016 CEC 690.64; under the 2023 NEC in force this maps to §705.12(B)(3)). A separate service-upgrade permit ('Electrical Services ... under 400 amps, $312') and form DBP-18 'Electric Service Questionnaire' apply if the panel/service needs to be changed - DBP-18 explicitly asks whether the applicant has contacted 'the electric utility (PG&E, Gridley Electric)'. 68% · published checklist
    • Is a specific mounting system or attachment spacing required? No named product, but real constraints: racking must be per the manufacturer's listing/installation instructions with connection details into framing members (DBP-71); a roof-mount job needs engineer/architect design if panel+support framing exceeds 3.0 psf or the panel-to-roof-plane angle exceeds 30 degrees (40 from horizontal) (DBP-72); tilting and ballasted systems always require engineered design. 68% · published checklist

20 questions answered against City of Gridley’s own published documents

Q29 Which NEC edition is in force? Core Code editions in force

2023 NEC, in force as the 2025 California Electrical Code (Title 24, Part 3). Butte County's own current design-criteria document (DPC-05), which the Building Division applies to the permits it processes for Gridley, lists '2025 California Electrical Code (CEC)' among the codes in force.

Why the confidence is not higherDPC-05 'Building Design Criteria' (Revised 2.18.26), downloaded and read myself. Extended to Gridley on the basis that Butte County performs all building/electrical permitting for Gridley addresses using its own current code adoption; I could not independently confirm Gridley's own adopting ordinance (amlegal blocked).

published checklist checked 2026-08-31 https://www.buttecounty.net/DocumentCenter/View/7553/DPC-05-Building-Design-Criteria---CBC-2025-PDF

Q30 Which building code edition is in force? Core Code editions in force

2025 California Building Code and 2025 California Residential Code (Title 24, Parts 2 and 2.5), per the same Butte County DPC-05 design-criteria document applied to Gridley permits.

Why the confidence is not higherDPC-05, downloaded and read myself, listing '2025 California Building Code (CBC)' and '2025 California Residential Code (CRC)' as current codes. Same extension caveat as Q29.

published checklist checked 2026-08-31 https://www.buttecounty.net/DocumentCenter/View/7553/DPC-05-Building-Design-Criteria---CBC-2025-PDF

Q31 Which fire code edition is in force? Code editions in force

Likely the 2025 California Fire Code (Title 24, Part 9), per DPC-05's current-codes list, but the enforcing agency for Gridley is genuinely unclear: Gridley operates its own combination fire department (CAL FIRE-staffed since 1991) separate from the 'CAL FIRE/Butte County Fire Department' Office of the Fire Marshal that reviews plans for the unincorporated county, yet the City's own fee schedule attributes Gridley's fire plan-check fee-setting to 'Butte County and Cal Fire' jointly.

Why the confidence is not higherDPC-05 for the likely code edition; the City's own Master Fee Schedule and Fire Department page for the enforcement ambiguity, both fetched/read myself. I could not resolve which specific office administers CFC plan review for a Gridley address, so this is recorded at reduced confidence rather than omitted.

fee schedule (ambiguous enforcement) + published checklist checked 2026-08-31 https://www.gridleyca.gov/DocumentCenter/View/182/Master-Fee-Schedule-PDF

Q32 Are there local amendments to any of the above? Core Code editions in force

Nothing published by this authority.

Where we lookedAttempted Gridley's own municipal code at codelibrary.amlegal.com/codes/gridley to check for local amendments to the building/electrical/fire code (403 Cloudflare bot challenge on every attempt this run, via curl with the recommended Referer header and via the fetch tool); Butte County's DPC-05 design-criteria document (downloaded and read) lists current code editions but does not itemize local amendments; Butte County Code §26-3/26-3.1 (which a companion county-level file reports contains administrative-only amendments) was also unreachable this run for the same Cloudflare reason.

https://codelibrary.amlegal.com/codes/gridley/latest/overview

Q33 What is the installation judged against? Core Electrical

The 2025 California Electrical Code (2023 NEC) Article 690/705, applied together with Butte County's own field guide DBP-69 'Photovoltaic Inspection Guidelines - Residential Interactive Systems' and the UL-listing requirement in DBP-72 ('Installation shall conform to the California Electric Code (CEC) Article 690, Solar Photovoltaic Systems. All equipment and components shall be listed and labeled by Underwriters Laboratories or other recognized agency'). CAUTION: DBP-69 itself still cites 2016 CEC article numbers throughout (last revised 4/10/18) even though the code actually in force is the 2023 NEC cycle.

Why the confidence is not higherDBP-69 and DBP-72, both downloaded and read in full by me with pdftotext.

published checklist checked 2026-08-31 https://www.buttecounty.net/DocumentCenter/View/3151/DBP-69-Solar-Inspection-Guidelines-PDF

Q34 Is there a local rule on service upgrades or busbar sizing? Electrical

Yes - a 20% backfeed/busbar rule. DBP-69 states: 'Photovoltaic interconnection circuit breaker at the Utility Service Panel shall not exceed 20% of the bussing rating and shall be positioned at the opposite end of the bussing from the main input circuit location (i.e. 20 amp for 100 amp panel)' (cited to 2016 CEC 690.64; under the 2023 NEC in force this maps to §705.12(B)(3)). A separate service-upgrade permit ('Electrical Services ... under 400 amps, $312') and form DBP-18 'Electric Service Questionnaire' apply if the panel/service needs to be changed - DBP-18 explicitly asks whether the applicant has contacted 'the electric utility (PG&E, Gridley Electric)'.

Why the confidence is not higherDBP-69 and DBP-18, both downloaded and read in full by me.

published checklist checked 2026-08-31 https://www.buttecounty.net/DocumentCenter/View/3151/DBP-69-Solar-Inspection-Guidelines-PDF

Q35 Is a specific mounting system or attachment spacing required? Structural & mounting

No named product, but real constraints: racking must be per the manufacturer's listing/installation instructions with connection details into framing members (DBP-71); a roof-mount job needs engineer/architect design if panel+support framing exceeds 3.0 psf or the panel-to-roof-plane angle exceeds 30 degrees (40 from horizontal) (DBP-72); tilting and ballasted systems always require engineered design.

Why the confidence is not higherDBP-71 and DBP-72, both downloaded and read in full by me.

published checklist checked 2026-08-31 https://www.buttecounty.net/DocumentCenter/View/3147/DBP-71-Residential-Roof-Mount-Solar-System-PDF

Q36 What ridge setback and access pathways are required? Core Fire pathways & setbacks

Not confirmed for a Gridley-specific amendment. The unamended 2025 California Fire Code §1205 and California Residential Code R329 (statewide ridge-setback/pathway/rapid-shutdown-marking rules for 1-2 family dwellings) would apply by default if no local amendment exists, but I could not confirm whether Gridley's own fire code (as opposed to the unincorporated county's) carries any local pathway/setback amendment, given the fire-enforcement ambiguity described in Q31 and my inability to reach Gridley's own code.

Why the confidence is not higherAbsence checked in DBP-69/70/71/72 (none mentions ridge setback or roof pathways) and in Butte County's fee schedule (a $160 'Solar Variance' fire-prevention fee exists for the unincorporated county's Fire Marshal, but its applicability to Gridley specifically was not confirmed). Given both the fire-authority ambiguity and the inaccessible city code, this is recorded at the floor of the confidence scale rather than omitted, because the state-code default is a real and citable fact even where local variation is unresolved.

published checklist (absence) + state code default checked 2026-08-31 https://www.buttecounty.net/DocumentCenter/View/3151/DBP-69-Solar-Inspection-Guidelines-PDF

Q37 Is rapid shutdown required, and to which NEC edition? Core Rapid shutdown

Yes - required, to the 2023 NEC (§690.12) as adopted in the 2025 CEC. Butte County's own field guide DBP-69, used for Gridley inspections, requires it explicitly: 'Photovoltaic systems located on or in a building shall include a Rapid Shutdown system'; 'Rapid Shutdown Equipment shall be listed and identified'; 'Controlled Conductors are limited to maximum 30 Volts and 240 Volt-Amps within 10 seconds of Rapid Shutdown initiation'; and the inspector verifies the permanent plaque reading 'PHOTOVOLTAIC SYSTEM EQUIPPED WITH RAPID SHUTDOWN'. Caveat: DBP-69 states this against the 2016 CEC citation (690.12/690.56(C)); the enforceable text today is the 2023 NEC.

Why the confidence is not higherDBP-69, downloaded and read in full by me, 'Rapid Shutdown' section quoted verbatim.

published checklist checked 2026-08-31 https://www.buttecounty.net/DocumentCenter/View/3151/DBP-69-Solar-Inspection-Guidelines-PDF

Q38 Which placards does this authority require at the service equipment? Core Labels Signage & labelling

Per DBP-69: on the AC disconnect, permanent ID of maximum AC output and operating AC voltage; where the DC disconnect/inverter/AC disconnect is not at the utility service panel, a permanent plaque on the utility panel naming the other equipment's location; the rapid-shutdown plaque/directory at the utility service; the DC disconnect labelled 'PHOTOVOLTAIC DC DISCONNECT' plus a shock-hazard warning and installed-system values (rated max power-point current/voltage, max system voltage, short-circuit current); and DC junction boxes run through the building labelled 'DC SOURCE CIRCUITS'. Rooftop micro-inverter systems (no DC disconnect) get the Installed System Information on the utility service panel instead.

Why the confidence is not higherDBP-69, downloaded and read in full by me.

published checklist checked 2026-08-31 https://www.buttecounty.net/DocumentCenter/View/3151/DBP-69-Solar-Inspection-Guidelines-PDF

Q39 Does the authority specify placard wording of its own? Core Labels Signage & labelling

No - the wording Butte County publishes (and applies to Gridley inspections) is the NEC's own standard wording, not an authority-invented text. DBP-69 reproduces strings like 'PHOTOVOLTAIC DC DISCONNECT', the shock-hazard warning, 'PHOTOVOLTAIC SYSTEM EQUIPPED WITH RAPID SHUTDOWN' and 'DC SOURCE CIRCUITS', each tied to a CEC article citation. No Gridley- or Butte-invented placard text was found.

Why the confidence is not higherDBP-69, downloaded and read in full by me, with each quoted string checked against the CEC article cited beside it.

published checklist checked 2026-08-31 https://www.buttecounty.net/DocumentCenter/View/3151/DBP-69-Solar-Inspection-Guidelines-PDF

Q40 Does it specify letter height, colour or material? Core Labels Signage & labelling

No letter height, colour or material is specified by DBP-69 (it only requires labels be 'proper and permanent') and Gridley Electric publishes no equivalent to a utility 'Greenbook' labeling spec in the two documents I obtained (Customer Generation Application, Interconnection Agreement). Default is the 2023 NEC's own general marking/durability standard.

Why the confidence is not higherAbsence checked in DBP-69 (downloaded, read in full) and in both Gridley Electric documents I could obtain; I did not find a separate published 'Gridley Electric Service Requirements' technical manual referenced in the application's declaration text, and could not confirm whether one exists outside what I could reach.

published checklist (absence) checked 2026-08-31 https://www.buttecounty.net/DocumentCenter/View/3151/DBP-69-Solar-Inspection-Guidelines-PDF

Q41 Is a site plan / facility map placard required, and what must it show? Core Labels Signage & labelling

Yes in substance. DBP-69 requires that where the DC disconnect, inverter and/or AC disconnect are NOT at the utility service panel, 'a permanent Plaque shall be installed on the Utility Panel identifying the location(s) of the other equipment' - a location-directory placard, corresponding to 2023 NEC §705.10/690.56. I found no Gridley Electric-specific site-plan/facility-map placard requirement beyond this.

Why the confidence is not higherDBP-69, downloaded and read in full by me; absence on the utility side checked in the two Gridley Electric documents obtained.

published checklist checked 2026-08-31 https://www.buttecounty.net/DocumentCenter/View/3151/DBP-69-Solar-Inspection-Guidelines-PDF

Q42 Does the UTILITY specify placards beyond the AHJ's? Core Labels Signage & labelling

Nothing published by this authority.

Where we lookedGridley Electric's own Customer Generation Application and Interconnection Agreement PDFs, both downloaded and read in full - neither specifies any placard/labeling requirement beyond referencing 'the Gridley Electric Service Requirements' (a document I could not locate on the City's site); checked the Electric Department page and Documents & Forms page for a separate technical interconnection manual and found none.

https://www.gridleyca.gov/180/Electric-Department

Q43 Where must the labels be placed? Core Labels Signage & labelling

Per DBP-69: on the DC disconnect (readily accessible, within sight of the inverter); on the AC disconnect; on the utility service panel where other equipment is remote from it (and for the Installed System Information on micro-inverter systems); and on DC-circuit junction boxes run through the building. Placement standards specific to Gridley Electric's own equipment (e.g. a utility-side AC disconnect switch) were not found in the two Gridley Electric documents obtained.

Why the confidence is not higherDBP-69, downloaded and read in full by me.

published checklist checked 2026-08-31 https://www.buttecounty.net/DocumentCenter/View/3151/DBP-69-Solar-Inspection-Guidelines-PDF

Q44 Must equipment be on a specific approved list? Equipment listing

Yes - listing, not a Gridley- or Butte-specific approved-products roster. DBP-72: 'All equipment and components shall be listed and labeled by Underwriters Laboratories or other recognized agency.'

Why the confidence is not higherDBP-72, downloaded and read in full by me.

published checklist checked 2026-08-31 https://www.buttecounty.net/DocumentCenter/View/3148/DBP-72-Job-Site-Requirements-for-Online-Roof-Mount-Solar-PDF

Q45 Are batteries permitted, and under what conditions? Core Battery / ESS

Yes, permitted, under the state codes (2025 CRC/CFC energy-storage provisions) as applied via Butte County's process. Butte County treats a battery as a chargeable per-system electrical item ('Power Walls - Batteries Per System: Residential $317'), which indicates routine permitting rather than prohibition; no Gridley- or Butte-specific ESS handout or additional condition was found.

Why the confidence is not higherButte County Master Fee Schedule, downloaded and extracted myself, section C.9. Extended to Gridley on the delegation basis; no Gridley-specific battery document exists to confirm independently.

fee schedule checked 2026-08-31 https://www.buttecounty.net/DocumentCenter/View/1549/Master-Fee-Schedule-PDF

Q46 Is there a separate ESS permit or inspection? Battery / ESS

Nothing published by this authority.

Where we lookedButte County Master Fee Schedule (downloaded and extracted) - shows a battery fee line ('Power Walls - Batteries Per System, Residential, $317') but does not state whether it is issued as a separate permit record or added to the PV permit; no Butte County or Gridley ESS-specific handout or permit page was found addressing this.

https://www.buttecounty.net/DocumentCenter/View/1549/Master-Fee-Schedule-PDF

Q47 Is a ground mount treated as a structure? Core Ground mount

Yes - Butte County treats a residential ground-mount array as a structure requiring full plan review, not an over-the-counter permit: fee $1,274 (vs. $356 roof mount), with site-specific foundation plans stamped by a CA engineer/architect, structural calculations and anchoring details for equipment over 400 lb, and a Geotechnical report where applicable. DBP-70 also separately requires the Gridley applicant to contact City Planning 'for land use and setbacks prior to submittal of plans' - meaning Gridley's own zoning, not the County's, governs setback/placement for a ground-mount system within city limits.

Why the confidence is not higherDBP-70 (which names Gridley explicitly) and the Butte County Master Fee Schedule, both downloaded and read in full by me.

published checklist + fee schedule checked 2026-08-31 https://www.buttecounty.net/DocumentCenter/View/3146/DBP-70-Ground-Mount-Solar-Systems-PDF

Q48 Where must the AC disconnect be, relative to the meter? Core Utility equipment

Nothing published by this authority.

Where we lookedGridley Electric's own Customer Generation Application and Interconnection Agreement, both downloaded and read in full - neither specifies AC disconnect placement relative to the meter (unlike PG&E's published 'Greenbook' document 060559, Gridley Electric publishes no equivalent technical interconnection manual that I could locate); checked the Electric Department page and Documents & Forms page for such a manual and found none.

https://www.gridleyca.gov/DocumentCenter/View/246

Lines marked with a percentage were read off this authority’s own published documents. Unmarked guidance is general good practice, not this jurisdiction’s rule — always confirm against the authority before you submit.

Inspection 5 steps · 14 questions
  1. Book it

    Booking is a portal, a phone call or an email depending on the authority, and the notice required is rarely zero. Book before the work is finished rather than after — the lead time, not the work, is usually what sets the date.

    • How is an inspection booked? Portal, with phone and email fallbacks, for the building/electrical inspection: Butte County's Inspections page states inspections are scheduled 'through ACA, in person, by phone (530-552-3699), or by email (dsbuilding@buttecounty.net)'. Fire Department inspections, where they apply, are booked through the separate CAL FIRE/Butte County Fire inspection line. 68% · department page
    • How much notice is required? No published minimum notice period for building inspections - the County states the booking channels but not a lead time; its Inspections page instead publishes the CURRENT day's assigned inspections (record, type, inspector, estimated time, address), implying booking closes at least the prior working day. 45% · department page
    • Are same-day or AM/PM windows offered? No fixed AM/PM window; the County instead publishes an estimated start time per inspection on its live daily schedule, with inspectors noted as able to arrive up to 1 hour before or after that time (an effective ~2-hour window). Same-day booking is not offered or mentioned. 55% · department page
  2. Know who turns up

    Some authorities inspect their own solar work; some delegate it, and a few do not inspect the PV equipment itself at all. Who is coming determines what they will look at.

    • Does this AHJ perform its own final solar inspection? Delegated. Building and electrical final inspection for Gridley residential solar is performed by Butte County Department of Development Services, Building Division staff, not by any City of Gridley employee. 85% · department page
    • If delegated, to whom? Butte County Department of Development Services, Building Division (7 County Center Drive, Oroville CA 95965; 530-552-3700; permit centre 530-552-3699). 88% · department page
  3. Work the stages in order

    A rough-in or mid-roof inspection, where one is required, has to happen before the work it covers is closed up. Missing a stage means opening something back up, and it is the most expensive kind of correction.

    • Which inspections are required, and in what order? Reported at reduced confidence: per BCC §26-103(e) (as reported by a companion Butte County research file, not independently re-verified this run due to the amlegal Cloudflare block) only ONE inspection - a 'Building Final Inspection' - is required for an eligible small residential rooftop system, with a re-inspection authorized if it fails. A service/panel-change component, if present, gets its own separate electrical inspection. Ground mount adds a structural sequence (footing/foundation before final). 45% · ordinance (not independently re-verified this run)
    • Is a rough-in or mid-roof inspection required? No - consistent with the single-inspection model described in Q54, there is no separate rough-in or mid-roof inspection for a standard residential rooftop PV system; DBP-69 instead requires the installer to provide roof/attic/garage access AT the single final inspection (temporary walking surface on tile roofs, secured ladders on two-story roofs). 55% · published checklist
  4. Have the paperwork on site

    The approved plan set, the permit, and the equipment listings should be on site and reachable. Inspectors routinely verify that installed equipment matches what was approved, and that the labels are the ones the plan set promised.

    • Is there a published inspection checklist? Yes - DBP-69 'Photovoltaic Inspection Guidelines - Residential Interactive Systems', a two-page field checklist covering In General / On Roof / DC Disconnect / Grounding / AC Disconnect and Utility Panel / Rapid Shutdown / Testing, with a CEC citation against nearly every line. Caveat: it is stamped 'Revised 4.10.18' and cites the 2016 CEC throughout, i.e. it predates the code cycle actually in force (2025 CEC/2023 NEC) by several cycles. 75% · published checklist
    • What must be on site at inspection? Per DBP-71/DBP-69/DBP-70/DBP-72: a printed complete set of the approved plans and specification sheets for all proposed equipment; the module count/locations must match the approved site plan; and the installer must provide inspection access (a supported temporary walking surface on tile roofs, secured ladders on two-story roofs, attic/garage access where wiring runs there). 72% · published checklist
    • Does the inspector verify labels and listings? Yes, explicitly and in detail per DBP-69: the inspector verifies structural supports and grounding methods, sunlight-resistant/listed wiring, connectors requiring a tool to open, DC disconnect location/listing and labelling, AC disconnect and utility-panel labelling, the rapid-shutdown plaque, grounding electrode conductors, the 20%-busbar backfeed breaker position, and runs a functional test (energize, observe output, open the PV breaker, confirm output drops to zero). 72% · published checklist
  5. Sign-off, and permission to operate

    Passing gives you a final or an equivalent sign-off. That is not the same as permission to operate: PTO comes from the utility, and who tells the utility the inspection passed varies. A system left switched off for weeks is usually waiting on this handover.

    • What is issued on pass? A passed Building Final Inspection that finals the permit. No standalone 'green tag' or certificate product for solar was found; the artifact the installer needs next is the finalled Butte County permit itself, since Gridley Electric's own application requires the completed permit/BC Final before it will proceed to meter installation ('BC Final / Notify' step on the Administration Checklist of the Customer Generation Application). 62% · department form
    • Who notifies the utility for PTO? Ambiguous between Installer and AHJ/utility-internal. Gridley Electric's own Customer Generation Application's Administration Checklist shows a 'BC Final / Notify' step preceding 'Multi-Register Meter Fee(s)' and 'Meter(s) Installed / Notify', implying the City itself (or its administration) tracks the Butte County final and then proceeds to metering - unlike PG&E's model where the installer affirmatively submits a PTO package. I could not determine from the documents obtained whether the installer, the customer, or City staff is responsible for triggering the 'Notify' step after the Butte County final. 50% · department form
    • Is there a re-inspection fee? No fee explicitly labeled 're-inspection' in Butte County's Master Fee Schedule; the applicable hourly line is likely 'Supplemental Inspection Fee, $156/hour' (alongside a 'Call-Out Fee' of $203/4-hr-min). No Gridley-specific re-inspection fee was found (the City's own fee schedule states fire/building inspection fees are set by the County). 55% · fee schedule
    • How are corrections issued and cleared? Not confirmed in detail for Gridley. Corrections to a Butte County-processed permit are typically issued as a written correction notice with resubmittal of a complete, corrected plan set through the same intake channels (counter/Ushare/email) or via Accela Citizen Access document upload; a field correction from a failed inspection presumably leads to the re-inspection discussed in Q59. 42% · published checklist (inference)

14 questions answered against City of Gridley’s own published documents

Q49 How is an inspection booked? Core Booking & scheduling

Portal, with phone and email fallbacks, for the building/electrical inspection: Butte County's Inspections page states inspections are scheduled 'through ACA, in person, by phone (530-552-3699), or by email (dsbuilding@buttecounty.net)'. Fire Department inspections, where they apply, are booked through the separate CAL FIRE/Butte County Fire inspection line.

Why the confidence is not higherButte County Inspections page, fetched myself.

department page checked 2026-08-31 https://www.buttecounty.net/257/Inspections

Q50 How much notice is required? Core Booking & scheduling

No published minimum notice period for building inspections - the County states the booking channels but not a lead time; its Inspections page instead publishes the CURRENT day's assigned inspections (record, type, inspector, estimated time, address), implying booking closes at least the prior working day.

Why the confidence is not higherAbsence checked directly on Butte County's Inspections page (fetched myself); a login-gated cutoff inside Accela Citizen Access cannot be ruled out since that portion is not visible to an anonymous user, which is why this is recorded at reduced confidence.

department page checked 2026-08-31 https://www.buttecounty.net/257/Inspections

Q51 Are same-day or AM/PM windows offered? Booking & scheduling

No fixed AM/PM window; the County instead publishes an estimated start time per inspection on its live daily schedule, with inspectors noted as able to arrive up to 1 hour before or after that time (an effective ~2-hour window). Same-day booking is not offered or mentioned.

Why the confidence is not higherButte County Inspections page, fetched and read by me on the checked_on date, including its stated caveat about the +/-1-hour arrival window.

department page checked 2026-08-31 https://www.buttecounty.net/257/Inspections

Q52 Does this AHJ perform its own final solar inspection? Core Who inspects

Delegated. Building and electrical final inspection for Gridley residential solar is performed by Butte County Department of Development Services, Building Division staff, not by any City of Gridley employee.

Why the confidence is not higherCity's own Building Inspection Services page and Master Fee Schedule (both cited under jurisdiction/Q1); consistent with the Butte County inspection process described on its own Inspections page.

department page checked 2026-08-31 https://www.gridleyca.gov/183/Building-Inspection-Services

Q53 If delegated, to whom? Core Who inspects

Butte County Department of Development Services, Building Division (7 County Center Drive, Oroville CA 95965; 530-552-3700; permit centre 530-552-3699).

Why the confidence is not higherSame sources as Q1/Q52.

department page checked 2026-08-31 https://www.gridleyca.gov/183/Building-Inspection-Services

Q54 Which inspections are required, and in what order? Core Stages & sequence

Reported at reduced confidence: per BCC §26-103(e) (as reported by a companion Butte County research file, not independently re-verified this run due to the amlegal Cloudflare block) only ONE inspection - a 'Building Final Inspection' - is required for an eligible small residential rooftop system, with a re-inspection authorized if it fails. A service/panel-change component, if present, gets its own separate electrical inspection. Ground mount adds a structural sequence (footing/foundation before final).

Why the confidence is not higherDBP-71's OTC-review-at-inspection mechanism (verified myself) is consistent with a single-inspection model, but the specific 'one inspection' statutory rule itself comes from BCC §26-103(e), which I could not reach this run; recorded at reduced confidence rather than omitted because it is corroborated by a companion research file three days prior.

ordinance (not independently re-verified this run) checked 2026-08-31 https://library.municode.com/ca/butte_county/codes/code_of_ordinances?nodeId=CH26BU_ARTVIISMREROSOENSY

Q55 Is a rough-in or mid-roof inspection required? Stages & sequence

No - consistent with the single-inspection model described in Q54, there is no separate rough-in or mid-roof inspection for a standard residential rooftop PV system; DBP-69 instead requires the installer to provide roof/attic/garage access AT the single final inspection (temporary walking surface on tile roofs, secured ladders on two-story roofs).

Why the confidence is not higherDBP-69, downloaded and read in full by me, 'In General' section, cross-checked against the single-inspection pattern in DBP-71.

published checklist checked 2026-08-31 https://www.buttecounty.net/DocumentCenter/View/3151/DBP-69-Solar-Inspection-Guidelines-PDF

Q56 Does the inspector verify labels and listings? Core What is checked

Yes, explicitly and in detail per DBP-69: the inspector verifies structural supports and grounding methods, sunlight-resistant/listed wiring, connectors requiring a tool to open, DC disconnect location/listing and labelling, AC disconnect and utility-panel labelling, the rapid-shutdown plaque, grounding electrode conductors, the 20%-busbar backfeed breaker position, and runs a functional test (energize, observe output, open the PV breaker, confirm output drops to zero).

Why the confidence is not higherDBP-69, downloaded and read in full by me, line by line.

published checklist checked 2026-08-31 https://www.buttecounty.net/DocumentCenter/View/3151/DBP-69-Solar-Inspection-Guidelines-PDF

Q57 Is there a published inspection checklist? Core What is checked

Yes - DBP-69 'Photovoltaic Inspection Guidelines - Residential Interactive Systems', a two-page field checklist covering In General / On Roof / DC Disconnect / Grounding / AC Disconnect and Utility Panel / Rapid Shutdown / Testing, with a CEC citation against nearly every line. Caveat: it is stamped 'Revised 4.10.18' and cites the 2016 CEC throughout, i.e. it predates the code cycle actually in force (2025 CEC/2023 NEC) by several cycles.

Why the confidence is not higherDBP-69, downloaded from the County's current forms and extracted with pdftotext by me; the revision stamp and 2016 CEC citations are on the face of the document.

published checklist checked 2026-08-31 https://www.buttecounty.net/DocumentCenter/View/3151/DBP-69-Solar-Inspection-Guidelines-PDF

Q58 What must be on site at inspection? Core Documents on site

Per DBP-71/DBP-69/DBP-70/DBP-72: a printed complete set of the approved plans and specification sheets for all proposed equipment; the module count/locations must match the approved site plan; and the installer must provide inspection access (a supported temporary walking surface on tile roofs, secured ladders on two-story roofs, attic/garage access where wiring runs there).

Why the confidence is not higherAll four documents downloaded and read in full by me with pdftotext.

published checklist checked 2026-08-31 https://www.buttecounty.net/DocumentCenter/View/3148/DBP-72-Job-Site-Requirements-for-Online-Roof-Mount-Solar-PDF

Q59 Is there a re-inspection fee? Corrections & re-inspection

No fee explicitly labeled 're-inspection' in Butte County's Master Fee Schedule; the applicable hourly line is likely 'Supplemental Inspection Fee, $156/hour' (alongside a 'Call-Out Fee' of $203/4-hr-min). No Gridley-specific re-inspection fee was found (the City's own fee schedule states fire/building inspection fees are set by the County).

Why the confidence is not higherButte County Master Fee Schedule, downloaded and extracted myself, Building Division Hourly Rates section; the schedule does not use the word 're-inspection', so mapping a failed-inspection revisit to this line is a reading of the fee names rather than an explicit statement.

fee schedule checked 2026-08-31 https://www.buttecounty.net/DocumentCenter/View/1549/Master-Fee-Schedule-PDF

Q60 How are corrections issued and cleared? Corrections & re-inspection

Not confirmed in detail for Gridley. Corrections to a Butte County-processed permit are typically issued as a written correction notice with resubmittal of a complete, corrected plan set through the same intake channels (counter/Ushare/email) or via Accela Citizen Access document upload; a field correction from a failed inspection presumably leads to the re-inspection discussed in Q59.

Why the confidence is not higherInferred from Butte County's general intake mechanics (DBP-70's digital submission channels, verified myself) rather than from a Gridley- or solar-specific published corrections procedure, which I did not find.

published checklist (inference) checked 2026-08-31 https://www.buttecounty.net/DocumentCenter/View/3146/DBP-70-Ground-Mount-Solar-Systems-PDF

Q61 What is issued on pass? Core Final sign-off & PTO

A passed Building Final Inspection that finals the permit. No standalone 'green tag' or certificate product for solar was found; the artifact the installer needs next is the finalled Butte County permit itself, since Gridley Electric's own application requires the completed permit/BC Final before it will proceed to meter installation ('BC Final / Notify' step on the Administration Checklist of the Customer Generation Application).

Why the confidence is not higherGridley Electric's own Customer Generation Application (downloaded and read myself) contains an 'Administration Checklist' listing 'BC Final / Notify' as a required step before 'Multi-Register Meter Fee(s)' and 'Meter(s) Installed / Notify'. Whether a certificate of occupancy is formally required or waived for a single-family retrofit in Gridley was not independently confirmed (would require the City's own building-code text, which was not reachable).

department form checked 2026-08-31 https://www.gridleyca.gov/DocumentCenter/View/247

Q62 Who notifies the utility for PTO? Core Final sign-off & PTO

Ambiguous between Installer and AHJ/utility-internal. Gridley Electric's own Customer Generation Application's Administration Checklist shows a 'BC Final / Notify' step preceding 'Multi-Register Meter Fee(s)' and 'Meter(s) Installed / Notify', implying the City itself (or its administration) tracks the Butte County final and then proceeds to metering - unlike PG&E's model where the installer affirmatively submits a PTO package. I could not determine from the documents obtained whether the installer, the customer, or City staff is responsible for triggering the 'Notify' step after the Butte County final.

Why the confidence is not higherGridley Electric's Customer Generation Application, downloaded and read in full by me; the checklist names the steps but not the responsible party for each 'Notify' action.

department form checked 2026-08-31 https://www.gridleyca.gov/DocumentCenter/View/247

Lines marked with a percentage were read off this authority’s own published documents. Unmarked guidance is general good practice, not this jurisdiction’s rule — always confirm against the authority before you submit.

Jurisdiction & key facts

The standing 62-question set, answered for City of Gridley against this authority’s own published documents. Every answer carries the confidence it was recorded at and the document it came from. Where nothing is published we say so and show where we looked — a blank here is a finding, not a gap.

City of Gridley is not the permitting authority for residential solar here 88% confidence
Holds
Planning/zoning review, business licensing, and its own municipal electric utility's interconnection approval. Building AND electrical plan review, permit issuance and inspection for residential solar are NOT performed by the City - they are contracted to the Butte County Department of Development Services, Building Division, effective 1 August 2017. Fire is ambiguous: Gridley operates its own 'combination fire department' (CAL FIRE career staff jointly funded by the City and Butte County since 1991) for suppression, but the City's own Master Fee Schedule states that fire-related inspection fees and 'Fire Department Plan Checks' for Gridley are established by 'Butte County and Cal Fire' - i.e. the same regional CAL FIRE/Butte County Fire Department Office of the Fire Marshal that reviews plans for the unincorporated county appears to also set/perform fire plan check for Gridley, distinct from the city's own suppression department.
Delegated to
Butte County Department of Development Services, Building Division (7 County Center Drive, Oroville CA 95965; 530-552-3700; permit centre 530-552-3699; dsbuilding@buttecounty.net) for building and electrical permitting/inspection.
Overridden by
CA Gov. Code §65850.5 (AB 2188) makes an eligible small residential rooftop solar permit (≤10 kW AC / ≤30 kW thermal, single/duplex dwelling) administrative, non-discretionary and limited to one inspection, statewide - this overrides any discretionary local review regardless of what Gridley's own zoning ordinance provides. Gov. Code §65850.55 bars valuation-based solar fees; §66015 caps rooftop solar permit fees; both are consistent with Butte County's flat $356 fee. AB 130 (Stats. 2025, Ch. 22) freezes more-restrictive local residential-code amendments from 1 Oct 2025 to 1 Jun 2031. City of Gridley Electric, as a municipal utility organized under the Municipal Utility Act (Pub. Util. Code §11501 et seq.), sets its own interconnection terms and is NOT subject to CPUC Rule 21 / the PG&E-style Solar Billing Plan that governs the rest of Butte County.
Why not higher
Delegation is confirmed from THREE independent City-published sources, not inferred from a department page alone: (1) the City's own 'Building Inspection Services' page states plainly 'Building Inspections Services are now performed by the Butte County Department of Development Services Building Division'; (2) the City's own Master Fees & Service Charges Schedule (eff. 2-1-2024) states under 'Building Inspection and Fire Plan Check Fees': 'Effective August 1, 2017, the City of Gridley City Council contracted with the County of Butte to provide Building Inspections services within the City of Gridley. Butte County and Cal Fire establishes Inspection Fees and Fire Department Plan Checks in compliance with State laws.'; (3) Butte County's own DBP-71 and DBP-70 solar handouts, which I downloaded and extracted myself with pdftotext, route Gridley applicants for PLANNING only ('If located in City of Gridley, contact the City Planning Department at (530) 846-3631'), implying Building/Electrical itself goes through the County's normal intake. Planning retained by the City is corroborated by Gridley's own Planning Services page. The utility finding (City of Gridley Electric Department, a municipal utility since 1910) is confirmed from the City's own Electric Department page, its Solar 2.0 FAQ, its own Customer Generation Application form, and its own Interconnection Agreement - all four independently downloaded and read. Confidence is not higher because I could not reach Gridley's own codified municipal code (codelibrary.amlegal.com/codes/gridley - blocked by a Cloudflare bot challenge on this run, both via curl with the recommended Referer header and via the fetch tool) to see a city ordinance stating the delegation in codified form, and because the fire-side split (city suppression department vs. county/CAL FIRE fire-prevention plan check) rests on one sentence in the fee schedule rather than a clean codified statement.

https://www.gridleyca.gov/DocumentCenter/View/182/Master-Fee-Schedule-PDF

Permit required
Yes. Butte County Code §26-102 requires a building permit for a small residential rooftop solar energy system,78%
Permit cost
$356 flat for a residential ROOF-mounted PV system (set by Butte County, which the City's own fee schedule confirms is the entity that 'establishes Inspection Fees'),82%
Plan review
For a standard roof-mount system: effectively none - it is processed over the counter with review happening at inspection.70%
Portal
Accela Citizen Access (ACA) - the Butte County Public Permit Portal at https://aca-prod.accela.com/BUTTECO/Default.aspx.80%
Electrical code
2023 NEC, in force as the 2025 California Electrical Code (Title 24, Part 3). Butte County's own current design-criteria document (DPC-05),72%
Own placard wording
No - the wording Butte County publishes (and applies to Gridley inspections) is the NEC's own standard wording, not an authority-invented text.70%
Booking an inspection
Portal, with phone and email fallbacks, for the building/electrical inspection: Butte County's Inspections page states inspections are scheduled 'through ACA, in person,68%
Labels & placards for this authority

Wording 70%

No - the wording Butte County publishes (and applies to Gridley inspections) is the NEC's own standard wording, not an authority-invented text. DBP-69 reproduces strings like 'PHOTOVOLTAIC DC DISCONNECT', the shock-hazard warning, 'PHOTOVOLTAIC SYSTEM EQUIPPED WITH RAPID SHUTDOWN' and 'DC SOURCE CIRCUITS', each tied to a CEC article citation. No Gridley- or Butte-invented placard text was found.

Size, colour & material 55%

No letter height, colour or material is specified by DBP-69 (it only requires labels be 'proper and permanent') and Gridley Electric publishes no equivalent to a utility 'Greenbook' labeling spec in the two documents I obtained (Customer Generation Application, Interconnection Agreement). Default is the 2023 NEC's own general marking/durability standard.

Where they go 62%

Per DBP-69: on the DC disconnect (readily accessible, within sight of the inverter); on the AC disconnect; on the utility service panel where other equipment is remote from it (and for the Installed System Information on micro-inverter systems); and on DC-circuit junction boxes run through the building. Placement standards specific to Gridley Electric's own equipment (e.g. a utility-side AC disconnect switch) were not found in the two Gridley Electric documents obtained.

What the utility wants on top None%

Each figure above is sourced and dated in the full answer set below (questions 38–43). Where an authority’s own published sheet is older than the code it has adopted, the answer says so.

Their website
Average approval time — application to PTO

From the CPUC interconnection record. Bars show the average days taken each year; a year with no recorded projects is left blank rather than drawn as zero.

About this authority
Type
City
County
Butte County
Regions served
1
Regions covered
City of Gridley · city
Solar Requirements
Separate roof inspection
Plan Check Plans Being Checked Today Type Submission Date Single Family 3 weeks ago Commercial 3 weeks ago Mobile Homes 3 weeks ago Accessory 3 weeks ago Ground Mounted & Non-Residential Roof Mounted Solar 3 weeks ago Re-checks 2 weeks ago Permit Portal The Permit Portal allows Licensed Contractors
Authority Contact
Address
7 County Center Drive, Oroville, CA 95965
Main Phone
530-846-5695
Building Department
Department
Butte County Department of Development Services Building Division (contracted by City of Gridley)
Direct Phone
530-552-3700
Portal Software
Accela
Booking & Scheduling
Preferred channel
online_portal
Notes
City of Gridley does not operate its own building division — all permits and inspections are contracted to Butte County Department of Development Services Building Division (7 County Center Drive, Oroville, CA 95965; main line 530-552-3700). Inspections can be scheduled via the Accela Citizen Access portal (requires a user account linked to the permit), by phone at 530-552-3699, or by email at bldg@buttecounty.net. Office hours: Mon/Tue/Fri 8am-4pm, Wed/Thu 8am-3pm. For solar PV: the Gridley Electric Utility Department must first review and approve the solar interconnection; plans are then submitted to Butte County Building Division for permit issuance and inspection. An alternate eTRAKiT portal also exists at https://permits.buttecounty.net/eTRAKiT/. (collected Jul 2026)