City of Folsom

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 95% · municipal code
• What does this authority permit itself, and what does it delegate? Both 90% · municipal code
• Is a permit required for a residential rooftop PV system? Yes 95% · municipal code
• Is there a separate electrical permit, or is it combined? Combined 70% · department page
• Is a HOA or architectural approval required first? No 90% · municipal code
• Is there a historic-district review? No, for a typical installation — solar panels are listed as an exempt 'minor modification' under the Historic District design-review ordinance. EXCEPTION: properties on the city's cultural resources inventory or an existing/potentially-eligible historic resource remain subject to Historic District Commission approval. 90% · municipal code
• Is a wind or windstorm certification required? No / not applicable 65% · municipal code (absence) + comparable-authority inference
• Is a Specific Use Permit or Council approval ever required? Yes, but narrowly — the chief building official MAY require a discretionary use permit if the official finds, on substantial evidence, that the system could have a 'specific, adverse impact' on public health/safety; such a determination is appealable to the Planning Commission (not directly to City Council) 90% · municipal code
• Is there a system-size cap on residential generation? No blanket size cap by the city; FMC 14.34 defines 'small residential rooftop' as ≤10 kW AC nameplate / ≤30 kW thermal solely as the threshold for EXPEDITED review (larger systems still permittable, just via standard, non-expedited plan review). Separately, SMUD (the utility, not the city) caps a customer's total generation at up to 110% of the customer's own historical electrical usage. 80% · municipal code + utility checklist

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 65% · utility page
• Is a homeowner permitted to self-install and self-permit? Yes 60% · department page / inference from state law

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? eTRAKiT/Symbium upload set: line (one-line) drawing, solar and equipment layout, PV attachment layout, racking and roof-sealant manufacturer spec sheets, equipment spec sheets with UL listing info, placards, SMUD approval letter, and (for the expedited track) the Symbium approval document/inspection checklist 85% · department page
• How many copies, and in what format? Electronic only via eTRAKiT (and Symbium for the expedited track) — no paper copies specified 70% · department page
• Is a site plan required, and what must it show? Yes — a solar/equipment site layout plan is required, showing the PV array and equipment layout on the property (uploaded as 'Solar and Equipment Layout' plus 'PV Attachment Layout') 75% · department page
• Is a one-line / three-line diagram required? Yes 80% · department page
• Is a structural PE stamp required, and at what threshold? No Folsom-specific numeric threshold was located; the ordinance (FMC 14.34.050) incorporates the checklist/worksheet approach of the state California Solar Permitting Guidebook, under which a structural PE stamp is only required if the project fails the standard roof/attachment worksheet checks (informal statewide norm is ~10 kW / half-roof-coverage screening) 50% · municipal code + inference

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? eTRAKiT (general permitting); Symbium (Instant Solar Permitting track for qualifying residential PV/ESS) 95% · department page
• Can the whole application be completed online? Yes 90% · department page
• What does a residential solar permit cost? Residential PV: Plan review $200 flat for systems ≤15 kW AC, plus $15 per additional kW above 15 kW, plus a $250 permit fee. Total is inclusive — the city states no further processing fee applies. (Standalone 'Battery Backup Storage' is billed separately at $388 per permit.) 95% · fee schedule
• How is the fee calculated? Tiered 95% · fee schedule
• Is there a separate plan-check fee? Yes 85% · fee schedule

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? 24 hours (Symbium/instant track, if all required documents are provided) or approximately 5–7 business days (standard eTRAKiT track, depending on staff availability) 90% · department page
• How long is an issued permit valid before it expires? Unissued applications expire 180 days after filing; an issued Building Permit is valid for 2 years under the Folsom Municipal Code (a local extension beyond the state-default 12 months), with one 180-day extension available on written request 90% · department page
• Which utility handles interconnection here? SMUD (Sacramento Municipal Utility District) — a municipally-owned utility, not a PUC-regulated IOU 95% · department page
• Where does the utility sit in the sequence? Parallel / multi-touch, not a single before-or-after dependency 85% · utility page

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 95% · municipal code
• Which building code edition is in force? 2025 California Building Code (based on the 2024 IBC), effective January 1, 2026 85% · department page (city's own currency notice) — codepublishing.com's parallel chapter is stale
• Which fire code edition is in force? 2025 California Fire Code and 2025 California Wildland-Urban Interface Code (based on the 2024 IFC) 95% · municipal code
• Are there local amendments to any of the above? Yes for Building, Residential, and Fire codes (each carries its own 'additions, amendments or deletions' section — FMC 14.02.050, 14.04.050, 8.36.080); the Electrical Code chapter (14.08) contains NO such amendments section and appears to adopt the 2025 CEC essentially unamended 90% · municipal code (structure of the chapter itself)
• What is the installation judged against? The 2025-cycle Folsom Building, Residential, Electrical (2023 NEC) and Fire Codes, each as locally amended, plus manufacturer UL/CEC listing requirements referenced in the city's and SMUD's checklists 85% · municipal code

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? Governed by the unamended 2025 California Fire Code §1205 (standard statewide ridge setback / pathway provisions); Folsom's only local amendment to §1205 addresses the remote electrical disconnect (§1205.6), not roof setbacks or pathways 80% · municipal code

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, rapid shutdown is required per NEC 2023 §690.12, adopted via the 2025 California Electrical Code; no local modification to the rapid-shutdown requirement was found 85% · municipal code + NEC edition in force

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? A placard/label package is a required submittal item ('Placards' on the eTRAKiT upload checklist); substantively these are the standard NEC 690/705 service-equipment markings (main service disconnect, PV disconnect, rapid-shutdown label, etc.) 70% · department page
• Does the UTILITY specify placards beyond the AHJ's? Only a functional (not wording) spec: SMUD requires that any utility-required visible/manual disconnect switch include markings/signage 'that clearly indicates open and closed positions' (§3.1.5.ii) — but SMUD waived the external-disconnect-switch requirement itself for standard UL-1741-listed inverter-based residential systems back in 2007, so this rarely applies today 65% · utility manual
• Where must the labels be placed? No Folsom-specific placement rule found beyond NEC 690/705 standard locations (service disconnect, meter, PV disconnect); SMUD separately requires that if any utility-required visible disconnect is not adjacent to the Point of Common Coupling, 'permanent signage must be installed at a SMUD approved location providing a clear description of the location of the device' 65% · utility manual

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.

• Where must the AC disconnect be, relative to the meter? SMUD does not require a dedicated external AC disconnect switch for standard UL-1741-listed inverter-based residential systems (waived since 2007); where a visible disconnect IS required by SMUD's operating practices, it must sit near the Point of Common Coupling or be accompanied by signage stating its location. Separately, the NEC-required service/PV disconnect (2023 NEC Art. 690/705) must be outdoor, readily accessible, and is typically placed at or immediately adjacent to the utility meter/main service panel. 65% · utility manual
• Must equipment be on a specific approved list? Yes — PV modules and inverters must be CEC-listed (California Energy Commission eligible-equipment list) and equipment generally must carry UL listing 85% · utility checklist + department page
• Are batteries permitted, and under what conditions? Yes — batteries/ESS are permitted; the city has a dedicated permit subtype ('BATTERY BACK UP STORAGE ONLY') and fee line ('Battery Backup Storage', $388). No local fire-code amendment specific to residential ESS was found; conditions default to the unamended 2025 CFC/CEC listing and installation requirements. 80% · department page + fee schedule
• Is there a separate ESS permit or inspection? Yes — 'Battery Backup Storage' is billed and permitted as its own line/subtype distinct from the PV permit ($388 flat vs. PV's $200+$15/kW+$250); no separate ESS-specific inspection process beyond the standard building inspection was documented 75% · fee schedule + department page
• Is a ground mount treated as a structure? Not established by a Folsom-specific ground-mount clause; FMC Chapter 14.34 is scoped only to ROOFTOP systems by its own title and definitions, so a ground-mounted array would fall outside the streamlined solar ordinance and, by default, be processed as an accessory structure under the Title 17 zoning code's general setback/height rules (not independently confirmed in a ground-mount-specific zoning section) 50% · municipal code (scope) + inference
• Is there a local rule on service upgrades or busbar sizing? No local rule found — the Electrical Code chapter (14.08) has no amendments section at all, so service-upgrade/busbar sizing is governed by the unamended 2023 NEC (Art. 705.12) as adopted 80% · municipal code (absence)
• Is a specific mounting system or attachment spacing required? No prescriptive city spacing rule found; the city instead requires manufacturer-specific, project-specific racking/attachment documentation ('Racking and Roof Sealant Spec Sheets') rather than setting its own attachment-spacing standard 60% · department page

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 90% · department page
• How much notice is required? Inspections can be scheduled up to 4 days in advance; next-day inspection requests must be in by 3pm, otherwise a minimum 2 business days out 90% · department page
• Are same-day or AM/PM windows offered? No AM/PM window selection is offered; job sites must be ready and accessible by 8am on the inspection day, and 'inspection time preferences may be requested; however, it is not a guarantee' 75% · 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 90% · department page
• If delegated, to whom? Not delegated — performed by Folsom's own Building Division (and, for a consolidated expedited-solar inspection, jointly with Folsom's own Fire Department) 85% · municipal code

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? Expedited/small-residential-rooftop track: a single inspection within 2 business days, potentially combining building + fire (FMC 14.34.050(D)). Standard (non-expedited) track: routed through the city's normal building-inspection sequence culminating in a 900-series Final Inspection (and, for full projects, prerequisite 800-series 'COO' inspections from Engineering/Planning/Arborist/Fire/etc. before a Certificate of Occupancy). 80% · department page + municipal code
• Is a rough-in or mid-roof inspection required? Not required for the expedited small-residential-rooftop track (only one inspection, per FMC 14.34.050(D)); no evidence found of a mandatory separate rough-in/mid-roof inspection specific to PV on the standard track either 65% · municipal code (absence)

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 85% · department page
• Does the inspector verify labels and listings? Yes (inferred) 65% · department page (inference)

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? Final (a 900-series Final Inspection sign-off); a Certificate of Occupancy is described on the Building Inspections page as tied to full projects with prerequisite COO inspections, and is not indicated as the standard close-out for a solar-only alteration permit 70% · department page (inference for solar-only scope)
• Who notifies the utility for PTO? Installer 75% · utility page
• Is there a re-inspection fee? $206 (second re-inspection or more) 95% · fee schedule
• How are corrections issued and cleared? Corrections are issued via eTRAKiT (or by the inspector directly); the Building Inspections page states inspections 'must be canceled prior to arrival of the inspector, or a re-inspection fee may be assessed,' implying a failed/incomplete inspection triggers the $206 re-inspection fee on the next visit. FMC 14.34.050(A) separately describes a written correction notice process for incomplete plan-review submittals (not field corrections). 60% · department page + municipal code