Colusa County

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? Yes — but only for UNINCORPORATED Colusa County. The two incorporated cities, City of Colusa (the county seat) and City of Williams, are each a separate AHJ with their own in-house Building Department. 96% · codified ordinance
• What does this authority permit itself, and what does it delegate? Both — the county's own Development Services Department (Building Division) issues and inspects both building and electrical permits in-house for unincorporated-area residential solar. Fire-code adoption sits with the county too (GCC Ch.5 Art.II §5-12 and a separate Ch.7), but field fire review is administered per-parcel by whichever city fire department, rural fire protection district, or CAL FIRE unit covers that address — not a county fire office (none appears in the county's own department directory). 85% · department page + general plan element
• Is a permit required for a residential rooftop PV system? Yes. 96% · codified ordinance
• Is there a separate electrical permit, or is it combined? Combined into a single building permit for qualifying small residential rooftop solar. The Building Permits page lists 'Electrical Plans' as one of several required drawings under one submittal, and GCC §5-36 sets one flat permit fee (not separate building + electrical fee lines) covering 'the average reasonable cost to the county to evaluate the system.' 75% · codified ordinance + department page
• Is there a historic-district review? No — the Colusa County Zoning Code (Ch.44) has no historic-preservation or historic-district-review article at all (confirmed against the chapter's full section table of contents); the only 'historic' references in the code are incidental, in agricultural-parcel and CEQA/housing-element contexts. 78% · codified ordinance (control-checked absence)
• Is a Specific Use Permit or Council approval ever required? No SUP/Council approval is required for a qualifying small residential rooftop solar system — GCC §5-35(a) mandates 'an administrative, nondiscretionary review process.' However, the Zoning Code (Ch.44) separately classifies 'Commercial solar photovoltaic facilities' and 'Photovoltaic power stations' as major/energy-generation land uses requiring a discretionary Use Permit with Planning Commission/Board review (the pathway the utility-scale 'Janus Solar and Battery Storage Project,' UP 20-01, went through) — a different, non-residential category. 85% · codified ordinance + zoning code + case file
• Is there a system-size cap on residential generation? 10 kW AC (alternating-current nameplate) / 30 kW thermal — the codified definitional ceiling for a 'small residential rooftop solar energy system' eligible for the flat-fee/administrative-review path (GCC §5-31(b)(1)). The same definition also caps panel/module array height at 'the maximum legal building height as defined by the county' (§5-31(b)(4)) — no separate height allowance above the district limit is granted, unlike some other CA jurisdictions. 90% · codified ordinance

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 or the homeowner. GCC §5-4 states: 'Nothing contained in this chapter shall be construed to prevent any person from performing his own building, plumbing or electrical work when performed with the permits and in compliance with the provisions of this chapter.' 82% · codified ordinance
• Is a homeowner permitted to self-install and self-permit? Yes. 90% · codified ordinance

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? General submittal package (from the county's own Building Permits page, not solar-exclusive): electrical plans, plumbing plans, truss calculations, energy calculations, plot plan, sprinkler plan (when applicable), and 'SOLAR PLAN (when applicable),' plus designer signature/statement on truss calcs and, if engineered, signed and stamped structural calculations. 85% · department page
• How many copies, and in what format? Electronic only, via the county's Online Permit Portal — 'Applications are now online only... Need help? Call or come in, we can help you apply.' No paper-copy count is specified since submittal is now digital-only through the portal. 78% · department page
• Is a site plan required, and what must it show? Yes. The plot plan must show: Assessor's Parcel Number, north arrow, property dimensions, all existing and proposed buildings/structures, distances between all buildings/structures and to property lines, utility locations (water supply, sewage disposal, leach field), all streets and easements (identified), and the location of the access road. 90% · department page
• Is a structural PE stamp required, and at what threshold? No solar-specific structural PE-stamp threshold found; the general (non-solar) building rule on the county's own Building Permits page states 'Structures 20' or more in length or width may require engineering and structural calculations,' and that any structure 'not of conventional wood frame construction or [with] unusual design features, or where there is insufficient lateral bracing shall be designed by a registered civil engineer or licensed architect.' 55% · department page (general, not solar-specific)

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? The county's 'Online Permit Portal' (ViewPoint Cloud / OpenGov), at colusacountyca.viewpointcloud.com, linked from the county's Building Permits and Development Services pages. 95% · department page + portal landing page
• Can the whole application be completed online? Yes — the portal supports account creation, application submittal, status tracking, payment, inspection requests, and messaging the reviewer, entirely online. 92% · department page
• What does a residential solar permit cost? $210 flat, for a qualifying 'small residential rooftop solar energy system' (≤10 kW AC / ≤30 kW thermal, on a single- or two-family dwelling). 92% · codified ordinance
• How is the fee calculated? Flat. 92% · codified ordinance
• Is there a separate plan-check fee? No separate plan-check fee identified for qualifying small residential rooftop solar — §5-36 describes the $210 flat fee as covering 'the average reasonable cost to the county to evaluate the system including, but not limited to, inspection and related clerical staff time.' (The general, non-solar Article III plan-review fee — 65% of the building permit fee, per 2001 CBC Table 1-A as locally modified — is a separate mechanism for standard permits, but nothing in Article IV layers it onto the solar flat fee.) 68% · codified ordinance

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? Same day for over-the-counter applications; 1 to 3 business days for electronically-submitted applications. 92% · codified ordinance
• Which utility handles interconnection here? PG&E (Pacific Gas & Electric). 80% · county-adjacent environmental document (Energy Impact Assessment)
• Where does the utility sit in the sequence? Parallel — utility interconnection review can proceed alongside county permitting, but Permission to Operate specifically is gated on the county's final electrical inspection clearance. 72% · utility tariff (PG&E Electric Rule 21)

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? Live: 2025 CEC (part of the 2025 California Building Standards Code / Title 24 cycle, effective 1 Jan 2026), per the county's own current Building page. Based on the 2023 NEC. BUT the codified county ordinance itself has an internal lag: GCC §5-10 (California Electrical Code) still literally reads '[t]he 2016 Edition of the California Electrical Code... is adopted,' last touched by Ord. Nos. 744/763/781, and has not been re-worded for later cycles the way §5-8 (the general Building Standards Code section) has. 62% · department page + codified ordinance (conflict)
• Which building code edition is in force? 2025 California Building Standards Code (Title 24 of the California Code of Regulations), published 1 Jul 2025, effective 1 Jan 2026. 90% · department page + codified ordinance
• Which fire code edition is in force? Ambiguous/conflicted, and reported as found rather than resolved. By the same self-updating logic as the Building Code, the LIVE fire code is presumably the current 2025 CFC (Title 24 Part 9) cycle — but the codified text has TWO separate problems: (a) GCC §5-12 (inside the modern Article II code-adoption chapter) still literally reads '2016 Edition,' the same unrepaired lag as the Electrical Code; and (b) a SEPARATE, apparently never-repealed Chapter 7 'Fire Prevention' independently adopts the 1982 Uniform Fire Code (a pre-Title-24, non-CFC legacy code, 'recommended by the Western Fire Chiefs Association') as 'controlling within the limits of the unincorporated areas of the county.' 45% · codified ordinance (internal conflict)
• Are there local amendments to any of the above? Yes. 90% · codified ordinance
• What is the installation judged against? The currently-adopted California Electrical Code (for the electrical installation), the California Building/Residential Code (for structural), and — per GCC §5-33(c) — 'all applicable safety and performance standards established by the California Electrical Code, the Institute of Electrical and Electronics Engineers (IEEE), Underwriters Laboratories (UL) or other national testing laboratory and, if applicable, rules of the Public Utilities Commission regarding safety and reliability.' 85% · codified ordinance

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.

Nothing recorded for Colusa County on this step yet — 1 question checked and found unpublished. The guidance above is general.

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? Required to the extent the currently-governing CEC (whichever edition actually controls, given the q29 conflict) requires it under NEC §690.12 — but no LOCAL rapid-shutdown-specific rule, amendment, or citation of '690.12' was found anywhere in the corpus checked. 60% · codified ordinance (corpus-wide absence)

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.

• Does the UTILITY specify placards beyond the AHJ's? Yes — PG&E requires a visible AC disconnect with open/closed position markings. Electric Rule 21 §H.1.d 'Visible Disconnect Required': the Producer must furnish a ganged, manually-operated isolating switch near the Point of Interconnection that must (i) 'allow visible verification that separation has been accomplished' and (ii) 'include markings or signage that clearly indicates open and closed positions,' reachable 24 hours a day by PG&E personnel. 85% · utility tariff (PG&E Electric Rule 21)

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? Implicitly yes, via a listing/testing-standard requirement rather than a named county 'approved list': GCC §5-33(c) requires solar-electric equipment to 'meet all applicable safety and performance standards established by the California Electrical Code, the Institute of Electrical and Electronics Engineers (IEEE), Underwriters Laboratories (UL) or other national testing laboratory.' 68% · codified ordinance
• Is a ground mount treated as a structure? Yes, by inference — the Zoning Code's general definition of 'Structure' ('[a]nything constructed or erected that requires attachment to the ground or permanently located on the ground, including swimming pools...') would capture a ground-mounted PV array; no PV-specific carve-out or ground-mount-specific solar development standard was found in the Zoning Code (Ch.44) itself. 62% · codified ordinance (inference)

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 (online inspection requests via the Online Permit Portal) or Phone at (530) 458-0481 — both explicitly offered. 85% · department page
• How much notice is required? 3 to 5 business days advance notice. 90% · department page

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? Yes. 92% · codified ordinance
• If delegated, to whom? Not applicable — inspection is performed directly by the county's own Building Department (Development Services Dept.), not delegated to any outside agency. 90% · codified ordinance

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? For a qualifying small residential rooftop solar system: a single, consolidated final inspection performed by the county Building Department after permit issuance — 'The inspection shall be done in a timely manner and should include consolidated inspections' (§5-35(h)); if it fails, 'a subsequent inspection is authorized' (§5-35(i)). 78% · codified ordinance
• Is a rough-in or mid-roof inspection required? No — for a qualifying small residential rooftop solar system, GCC §5-35(g) limits the process to 'only one inspection,' which by implication excludes a separate rough-in/mid-roof inspection for that category. 72% · codified ordinance (inference)

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.

• What must be on site at inspection? Approved and stamped plans and specifications on-site (if applicable), the building permit number, and a legible address posted visible from the nearest county road (with intermittent directional signage required if the project site is more than 100 yards off the county road). 88% · department page

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.

• Who notifies the utility for PTO? Installer (as the customer's applicant/agent) — PG&E's own interconnection process is applicant-driven throughout Rule 21 (the 'Applicant' submits the Interconnection Request, supporting documents, and — per §D.13.b — evidence of the AHJ's final inspection clearance, to trigger PG&E's PTO processing). 55% · utility tariff (inference)
• Is there a re-inspection fee? $47 per hour. 92% · department page + codified fee table
• How are corrections issued and cleared? A failed or cancelled inspection must be reported to the Building Department office before 8:00am the day of the requested inspection or a re-inspection fee applies; for a small residential rooftop solar system specifically, GCC §5-35(i) provides that 'if a small residential rooftop solar energy system fails inspection, a subsequent inspection is authorized.' 80% · department page + codified ordinance