City of St. Helena

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 92% · department page
• What does this authority permit itself, and what does it delegate? Both 90% · department page + published checklist
• Is a permit required for a residential rooftop PV system? Yes 92% · published checklist (PDF, extracted with pdftotext)
• Is there a separate electrical permit, or is it combined? Combined 85% · department page
• Is a HOA or architectural approval required first? Conditionally yes — required only where an HOA exists 75% · published checklist
• Is there a historic-district review? No, not for an ordinary residential parcel 55% · department page (partial absence check)
• Is a wind or windstorm certification required? No 60% · department page (absence checked against downloaded solar/building documents)
• Is a Specific Use Permit or Council approval ever required? Not for a typical over-the-counter residential system — the small residential solar/ESS path is handled entirely by the Building Division with no Planning Commission or City Council review referenced anywhere in the solar documents. The Development Review Process page (which does describe a discretionary Planning Director/Planning Commission/Council process with CEQA review and public hearings) applies to other categories of development, not to the solar checklist's own procedure. 65% · department page (inference)
• Is there a system-size cap on residential generation? No absolute cap on residential system size, but the checklist's over-the-counter/no-plans path is limited to roof-mount PV under 15 kW DC and ESS ≤80 kWh in a detached garage/shed/accessory structure or exterior location; larger residential systems are routed to the same full-plans path used for commercial/ground-mount/canopy systems rather than being capped outright. 80% · published 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% · published checklist + declaration form
• Must the contractor be registered with this authority before applying? Yes 65% · fee schedule (PDF, extracted with pdftotext)
• Is a homeowner permitted to self-install and self-permit? Yes 88% · published form (PDF, extracted with pdftotext)

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? Bifurcated by size/mount. Residential roof-mount PV <15 kW DC and ESS ≤80 kWh (in a detached garage/shed/accessory structure or on the exterior): NO PLANS — applicant completes the Solar PV & ESS Permit Worksheet (a self-certification checklist) plus the Licensed Contractor's/Owner-Builder Declaration, and the system is issued over the counter. Commercial, canopy, ground-mount, or any system exceeding that threshold: full plan set required — Title Page, Site Plan (setbacks/easements/sewer & water laterals), Structural Calculations (or prescriptive framing-member sheet), Single-Line Electrical (stamped EE or signed C10/installer), Attachment Details, Footing Details + signed structural calcs (ground-mount), equipment cut sheets, Stormwater Requirements Applicability Checklist (ground-mount, Public Works), plus conditional Electrical Worksheet, Owner-Builder Disclosure, HOA Pre-Approval, and Agent Authorization Form as applicable. 92% · published checklist (PDF)
• How many copies, and in what format? Electronic only, via eTRAKiT (PDF preferred; DOC/DOCX/XLS/JPG/PNG also accepted); no copy-count specified for the electronic upload. However, the Owner-Builder Disclosure Form itself requires a wet ('original') signature verified at permit issuance against a driver's license or notarization — a physical-verification step layered on an otherwise fully electronic process. 75% · published guide + form (PDFs)
• Is a site plan required, and what must it show? Required only on the plans-submittal path (commercial/canopy/ground-mount, or roof-mount ≥15 kW DC): must show setbacks, easements, and sewer & water lateral lines/connection points. The over-the-counter roof-mount/ESS path (<15 kW DC, ≤80 kWh ESS) requires NO site plan at all. 88% · published checklist
• Is a one-line / three-line diagram required? Yes, on the plans-submittal path only — 'Single Line Electrical, stamped by an electrical engineer or signed by a C10 or the licensed installer with their license number' is a listed required document. The over-the-counter path substitutes a self-certification worksheet (busbar/backfeed/conductor questions) instead of a drawn one-line diagram. 85% · published checklist + worksheet
• Is a structural PE stamp required, and at what threshold? No fixed numeric valuation/weight threshold triggers a mandatory structural-engineer stamp. Roof-mount: applicant may submit either 'Structural Calcs' or, as an explicit alternative, two copies of sheets showing wood type/sizing/spacing/span of the roof framing members plus roofing material type (a prescriptive path, no stamp implied). Ground-mount footings always require 'signed structural calculations for array mounting systems.' 75% · published checklist
• Is an electrical PE stamp required, and at what threshold? No electrical PE stamp is mandatory at any threshold — the checklist's single-line electrical diagram may be 'stamped by an electrical engineer, OR signed by a C10 or the licensed installer along with their license number,' i.e. a contractor sign-off is always an acceptable alternative to an engineer's stamp. 88% · published checklist

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 (https://sthln-trk.aspgov.com/eTRAKiT/) 92% · department page
• Can the whole application be completed online? Yes 78% · department page
• What does a residential solar permit cost? $436 flat for residential roof-mounted PV up to 15 kW, plus $15/kW for capacity above 15 kW; commercial PV is $1,000 plus $7/kW between 51-250 kW and $5/kW above 250 kW. (Separately: Solar Water Heating is $654 roof-mounted / $794 ground-mounted.) 90% · fee schedule (PDF)
• How is the fee calculated? Tiered 88% · fee schedule
• Is there a separate plan-check fee? No 75% · 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? Over-the-counter for eligible small residential solar/ESS (issued same-day, no plan review). For any system requiring plans: 'Rapid' review returns comments/approval within 14 working days; 'Standard' review within 28 working days. 80% · published pamphlet (PDF, undated) + department page
• How long is an issued permit valid before it expires? 365 days from issuance to commence construction; inspections may not stop for more than 365 days without the permit automatically expiring. An extension may be granted by the Chief Building Official if requested before expiration, for an administrative fee. 85% · published pamphlet (PDF, undated)
• Which utility handles interconnection here? Pacific Gas & Electric (PG&E) for transmission/distribution and interconnection; Marin Clean Energy (MCE), a Community Choice Aggregator the city joined in 2016, is the default electricity-generation provider (customers may opt back to PG&E generation) 80% · department page
• Where does the utility sit in the sequence? Parallel 55% · utility page (not city-specific)

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 65% · published checklist (PDF) + inference from adjacent-jurisdiction code cycle
• Which building code edition is in force? 2025 California Building Code and 2025 California Residential Code (both based on the 2024 IBC/IRC cycle) 85% · published checklist (PDF)
• Which fire code edition is in force? 2025 California Fire Code (based on the 2024 IFC), inferred 60% · department page + code TOC (inference)
• Are there local amendments to any of the above? Yes 60% · code table of contents (Wayback Machine capture, dated 17 Dec 2025, current through Ord. 25-6 of 14 Oct 2025)
• What is the installation judged against? The 2025 CBC/CRC, 2025 CEC (2023 NEC base), and 2025 CFC as locally amended, plus the city's own Solar PV & ESS Building Checklist and Permit Worksheet and its codified Ch. 15.26 expedited-permit chapter 75% · published checklist + inferred code cycle

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? From the city's own worksheet: modules must not be located closer than 3' to a bedroom egress window (2-story homes only), and — except on detached garages — modules must maintain at least a 3' setback at ridges and along the sides of the roof 'for fire department operations.' 85% · published worksheet (PDF)

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? Rapid shutdown is presumed required per NEC Article 690.12 as incorporated via the 2023 NEC/2025 CEC (Ch. 15.24) — but this is an inference, not a direct city citation. Notably, the city's own Solar PV & ESS Permit Worksheet and Checklist never cite '690.12' or the phrase 'rapid shutdown' anywhere; the only labeling reference is the generic 'All required labels will be installed at proper location(s) per 690 and 110 CEC.' 55% · published worksheet (PDF, control-checked)

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? The worksheet requires: (1) PV labels 'installed at proper location(s) per 690 and 110 CEC' (generic, not itemized by the city); (2) for ESS, a specific city-worded 'warning label indicating a second, third, or fourth source of power is on site when utility, PV, ESS, and/or generator power is present'; (3) an 'emergency battery disconnect ... located within sight and near the main electrical service panel.' 80% · published worksheet (PDF)
• Does the authority specify placard wording of its own? Yes, for ESS only 80% · published worksheet (PDF)
• Where must the labels be placed? PV equipment (inverter, fused disconnects, etc.) must be 'located within sight and as close as practical to [the] main electrical Service panel'; the ESS emergency battery disconnect must likewise be 'located within sight and near the main electrical service panel.' No separate rule for where the labels themselves (as opposed to the equipment) must be affixed beyond 'per 690 and 110 CEC.' 78% · published worksheet (PDF)

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? Not stated relative to the meter specifically — the city's own rule is that all PV equipment, including fused disconnects and the inverter, must be 'located within sight and as close as practical to [the] main electrical Service panel,' which in most St. Helena residential services sits adjacent to the meter. 60% · published worksheet (PDF)
• Must equipment be on a specific approved list? Yes 88% · published worksheet (PDF)
• Are batteries permitted, and under what conditions? Yes, subject to conditions: ESS up to 80 kWh per location/property may go over-the-counter if installed in a detached garage/shed/accessory structure or on the building exterior; batteries must sit ≥3' from any openable door/window leading directly into the residence and ≥3' apart from each other; an emergency battery disconnect must be located within sight and near the main service panel; and required warning labels (multi-source-of-power) must be installed. Systems not meeting this profile go through the full plans-required path. 88% · published worksheet (PDF)
• Is there a separate ESS permit or inspection? No 70% · department page (absence checked)
• Is a ground mount treated as a structure? Yes, functionally 78% · published checklist
• Is there a local rule on service upgrades or busbar sizing? No stricter local rule found — the city's own Solar PV & ESS Permit Worksheet simply restates the standard (unamended) NEC 705.12(A) 120%-of-busbar backfeed-breaker rule as a self-certification question, rather than adding a local amendment on top of it. 65% · published worksheet (PDF, absence of local amendment checked)
• Is a specific mounting system or attachment spacing required? No specific numeric mounting/attachment-spacing standard is published; the checklist simply requires 'Attachment Details – or chosen panel framing system' be submitted with the application for staff review against the manufacturer's own engineering, plus a requirement that modules be installed on roof structures 'capable of carrying the imposed loads.' 60% · published checklist (absence checked)

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 (eTRAKiT) 85% · department page (current, dated notice)
• How much notice is required? 24 hours 55% · published pamphlet (PDF, undated)
• Are same-day or AM/PM windows offered? Yes — AM/PM windows. Building Division page: inspections available Tuesdays-Thursdays 9 a.m.-12 p.m. and 1 p.m.-3 p.m. (The older Inspections Pamphlet states 9am-12pm or 12pm-3pm — a minor discrepancy between the two city documents on the exact PM start time.) 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 85% · published pamphlet (PDF)
• If delegated, to whom? Not delegated — the city's own Building Division performs building/electrical inspection, and the city's own Fire Department (not Napa County) performs fire-related sign-offs, e.g. the Inspections Pamphlet's note that 'Hydro-static test for fire sprinklers must be approved and signed-off by the Fire Prevention Division' prior to a frame inspection. 75% · department page (absence checked)

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 typical residential solar/ESS system, the documents point to a single final inspection ('All Permits require a FINAL inspection'); no solar-specific rough-in stage is itemized anywhere in the city's Types of Inspections list, which is oriented toward new construction (ground plumbing, foundation, under-floor frame, shear/roof deck, lath, insulation, drywall, gas test, final). 60% · published pamphlet (PDF, inference)
• Is a rough-in or mid-roof inspection required? No 60% · published pamphlet (absence checked, 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.

• Is there a published inspection checklist? Yes, in substance 55% · published worksheet (PDF)
• Does the inspector verify labels and listings? Likely yes, though not stated as a discrete inspection-checklist item 60% · published worksheet (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 72% · published pamphlet (PDF)
• Who notifies the utility for PTO? Installer 50% · utility page (not city-specific)
• Is there a re-inspection fee? $124.50 for the first half hour (1-hour minimum), $105 for each additional half hour ('Supplemental Inspection Fee') 75% · fee schedule (PDF)
• How are corrections issued and cleared? Not itemized as a formal written-correction-notice process in any city document found; the Inspections Pamphlet states only that 'additional fees [may be] charged if required corrections are not made within a certain time frame, at the discretion of the Chief Building Official,' implying informal correction-and-reinspect handling rather than a documented notice-and-clear procedure. 55% · published pamphlet (PDF)