Trinity 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. Trinity County is the AHJ for residential solar countywide because Trinity County has NO incorporated cities at all -- every named community (Weaverville, Hayfork, Lewiston, Junction City, Douglas City, Trinity Center, Hyampom, Big Bar, Salyer, Burnt Ranch, Denny, Wildwood, South Fork, etc.) is an unincorporated 'Planning Area' of the county's own General Plan, not a municipality with its own building department. 95% · county planning document
• What does this authority permit itself, and what does it delegate? Both -- Building AND Electrical, self-performed in-house by the Community Development Department's Building Division (named Chief Building Official Cody Smith, plan checker; Miles Tralle, Building Inspector I). Fire/life-safety review for the county's own 'Fire Safe' wildfire-defensible-space standards (Trinity County Ordinance 1162 / TCC Ch. 8.30, implementing state PRC 4290) is performed by CAL FIRE's Trinity Unit (a CDF Battalion Chief signs the 'CAL FIRE Acknowledgement Form'), but the Building Department retains final authority: the form states conditions 'are required to be completed prior to the final building inspection by the Trinity County Building Department.' No separate County Fire Code (CFC) adoption chapter was found (see Q31). 88% · department application form
• Is a permit required for a residential rooftop PV system? Yes. A building permit is required for a residential rooftop PV system. 95% · codified ordinance
• Is there a separate electrical permit, or is it combined? Combined into a single application, but priced as separate trades. The county's Building Permit Application form is one document with checkboxes for 'Dwelling / Remodel / Addition / LDRD / Electrical / Mechanical / Accessory Structure / Demolition' -- there is no dedicated 'Solar' box, so a rooftop PV job is filed as 'Electrical' (or 'Accessory Structure' for a ground mount) on the same form used for everything else. The county's own fee ordinance nonetheless prices 'Building Permit,' 'Electrical,' 'Mechanical' and 'Plumbing' as separate permit-processing-fee categories, each with its own $45/$58 base fee, and lists a 'Solar system' line under BOTH the Electrical schedule (valuation-based) and the Plumbing schedule ($45/$45flat for solar water heating) -- so one submittal can generate more than one trade-fee line. 72% · department application form + fee schedule
• Is a HOA or architectural approval required first? No HOA/architectural-approval requirement was found in any Trinity County document, and no general design-review or architectural-review chapter exists anywhere in the zoning title (control-checked: 0 hits for 'design review' or 'architectural review' establishing a discretionary review BODY, against 133 hits for the positive control 'setback' and 0 for the fabricated control 'zzqqx' across the full 63-chapter Title 17 text). 78% · codified ordinance (control-checked absence)
• Is there a historic-district review? No general historic-district design-review process (no Certificate-of-Appropriateness-style ordinance) was found in the zoning title. The only historic references found are narrow: TCC 17.27.060 precludes siting a MOBILE/manufactured home within any National-Register historic district, and the floodplain-variance chapter (17.29B.270) allows a variance for repair/restoration of a National-Register or State-Inventory historic structure. Neither creates a discretionary review gate for a rooftop PV retrofit. 68% · codified ordinance (control-checked)
• Is a wind or windstorm certification required? No windstorm/wind-speed certification requirement was found anywhere in the county's own documents (control-checked absence: zero 'wind' hits beyond 'window/door' in the full Building Permit Application packet, and no Building-Division handout addresses wind exposure or design wind speed). 75% · department checklist (control-checked absence)
• Is a Specific Use Permit or Council approval ever required? Not specifically codified for solar. The general Use Permit / Conditional Use Permit mechanism (present in every zoning district chapter) could be triggered by a freestanding/ground-mount array that exceeds the general accessory-structure height (25 ft in R/A/H/RR districts per TCC 17.30.050(E)) or that does not fit the district's listed accessory uses, and the county's Fire Safe Ordinance (Ch. 8.30) has its own separate exception/appeal process for wildfire-standard deviations. No dedicated 'Council approval for solar' trigger was found. 55% · codified ordinance (inference)
• Is there a system-size cap on residential generation? No. There is NO codified system-size cap or eligibility-gate ordinance for residential solar anywhere in Trinity County Code -- a clean, control-checked absence (1 stray 'photovoltaic' hit across the entire 118-section Title 15 and 63-chapter Title 17 corpus, and it is an unrelated cannabis-cultivation renewable-energy clause, not a residential PV rule; 'solar' appears exactly once, in an unrelated Limited-Density-Rural-Dwelling heating-fuel clause; positive control 'electrical' hit 42/133 times in Titles 15/17 respectively, fabricated control 'zzqqx' zero). This is a real gap, not a search failure: the SAME Title 15 contains a fully built-out 'EXPEDITED ELECTRIC VEHICLE CHARGING STATION PERMITTING' chapter (TCC 15.26, Ord. 1364, adopted 21 Mar 2023) implementing Gov. Code Section 65850.7 -- proving the county knows how to adopt this style of streamlined ordinance -- with no equivalent chapter ever adopted under Gov. Code Section 65850.5/.52/.55 for solar. 90% · codified ordinance (control-checked absence + contrast)

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 state-licensed contractor (license class and number entered on the application) or a homeowner acting as an owner-builder. 85% · department application form
• Must the contractor be registered with this authority before applying? No county-specific contractor registration requirement beyond the standard state CSLB license number entered on the application was found. The county's 'Contractors List' (linked from the Building Division page) is a plain courtesy directory of local contractors' names and phone numbers with no registration language, and Title 5 of the county code (Business Taxes, Licenses and Regulations) has no general contractor/business-license chapter -- only bingo, cardrooms and similarly specific licenses. 70% · department handout
• Is a homeowner permitted to self-install and self-permit? Yes. A homeowner may self-install and self-permit as an owner-builder. 92% · department application form

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? A complete Building Permit application; three complete sets of building plans (signed by the drafter or, if engineered, wet-stamped by a CA-licensed engineer, indicating the applicable snow load and CBC code year); three copies of a plot plan plus one copy of a location map; a Plan Review Fee deposit; for solar/wood-stove/water-heating systems specifically -- type of system, pumps, tank sizes, heat exchangers, solar panels, blowers, pipe unit, and the manufacturer's name plus technical/installation data; two sets of Title 24 energy calculations (Trinity County is in Climate Zone 16) on conditioned structures; engineering data (two sets, wet-stamped) if manufactured/job-built trusses are used or the site has special conditions; and a signed CAL FIRE Acknowledgement Form before final. 85% · department checklist
• How many copies, and in what format? Paper only: three complete sets of building plans, three copies of the plot plan, and one copy of the location map (8.5x11 if the plot plan is larger). No online upload option or portal was found -- see Q20/Q21. 85% · department checklist
• Is a site plan required, and what must it show? Yes. The site plan must show a north arrow, the proposed structure's square footage, all four setbacks (front/sides/rear), the building type/use and square footage of every EXISTING structure on the parcel (for lot-coverage calculation), the parcel in its entirety, and the name of the main access road. 90% · department checklist
• Is a one-line / three-line diagram required? Very likely yes by inference -- no Trinity County document uses the literal phrase 'one-line' or 'three-line diagram' (a control-checked absence across the whole 13-page application packet), but the packet's 'FLOOR PLAN' item requires 'plumbing fixtures, electrical and lighting outlets' to be shown and the standard electrical plan-check process presupposes a wiring diagram of that detail for a PV interconnection. 55% · department checklist (inference)
• Is a structural PE stamp required, and at what threshold? No fixed kW, weight or dollar threshold is stated. The application packet requires two wet-stamped sets of engineering 'if manufactured or job built trusses are to be used' or if the site presents 'special problems such as: steep slope; unstable or filled ground; or is in a flood plain,' or an unusual structure shape -- a general, not solar-specific, engineering trigger. A structural PE stamp for a PV mounting system would most likely be required whenever the racking falls outside a manufacturer's prescriptive listing or the roof snow load exceeds 50 psf (which independently triggers a 'lateral design' requirement per the packet). 55% · department checklist (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? None found. Trinity County does not appear to operate an online permitting portal (no Accela/EnerGov/eTRAKiT/SolarAPP+/OpenGov instance found anywhere on the county's site). Submittal is in person or by mail/fax to the Community Development Department, Building Division, 61 Airport Road, Weaverville; inspections are booked by phone. The county's only public-facing 'portal' (CivicClerk, at trinitycoca.portal.civicclerk.com) is for Board/Planning Commission agendas and minutes, not permitting. 78% · department page (control-checked absence)
• Can the whole application be completed online? No. There is no online application system; see Q20. 76% · department page (control-checked absence)
• What does a residential solar permit cost? For the ELECTRICAL trade: a 'Solar system' permit is billed at 'valuation per CBC' (i.e., computed off the ICC/CBC building-valuation table, not a flat or per-kW figure), on top of a $58 electrical permit-processing fee (2023 ordinance's 'fully weighted' column; original was $45). Separately, under the PLUMBING trade, a 'Solar system' line (solar water heating) is a flat $45 (fully weighted; $35 original). A Plan Review Fee deposit is also charged (see Q17). NOTE: the county's own linked 'fee schedule' PDF is itself an unsigned ordinance TEMPLATE -- 'Ordinance No. XXXX,' date and Board vote all left blank -- so treat these dollar amounts as the best available but formally unexecuted copy of the current schedule; other county fee pages (Assessor, Clerk-Recorder) separately reference fees 'updated February 1, 2026 in accordance with the adopted Trinity County Fee Schedule,' suggesting a newer consolidated adoption exists that could not be located for Building specifically. 72% · fee schedule (irregular: unsigned draft)
• How is the fee calculated? Valuation-based (per CBC) for the Electrical 'Solar system' permit fee; a flat fee ($45) for the Plumbing 'Solar system' (solar water heating) line. Not per-kW and not per-panel anywhere in the county's fee documents. 78% · fee schedule
• Is there a separate plan-check fee? Yes. A separate Plan Review Fee deposit is required with every building-plan submittal, described as covering plan review and zoning review combined; the applicant must call or email the office to have the amount calculated case-by-case (it is not a single published line item). 85% · department application form

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? Up to 6 weeks (approximately 30 business days) upon a complete submittal. 82% · department application form
• How long is an issued permit valid before it expires? 180 days: if construction is not started within 180 days of permit issuance, or work is stopped for any 180-day period, the permit 'shall be deemed revoked' absent contact/extension. NOTE (drafting lag): the application packet cites this rule to the superseded 'UNIFORM BUILDING CODE -- SECTION 303(D)' even though the county's own codified adoption ordinance (TCC 15.04.080) names the current California Building Code, not the UBC -- recorded as written, a stale statutory citation inside a current, actively-used form. 70% · department application form (stale citation noted)
• Which utility handles interconnection here? Trinity Public Utilities District (Trinity PUD) -- NOT Pacific Gas & Electric as commonly assumed. Trinity PUD's own site states plainly that, with 7,230 meters, it 'serves most of the customers in Trinity County' with 100%-renewable hydroelectric power, having purchased PG&E's former Shasta-Division distribution system covering most of the county in a 1993 $12,000,000 settlement (and having earlier condemned PG&E's Hayfork facilities in 1987). PG&E may still serve some remaining outlying parts of the county that were not part of that acquisition, but no specific PG&E-served community within Trinity County could be identified from a county- or utility-side document in this run -- confirm per address before relying on Rule 21. 85% · utility's own document
• Where does the utility sit in the sequence? After permit / gated on the AHJ's approval. Trinity PUD's own 'Upgrade Service' page states outright: 'One important step is that prior to Trinity PUD installing the electric power the Trinity County Building Department has to inspect and approve your electrical panel.' 90% · utility's own document

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, via the 2025 California Electrical Code (Title 24, Part 3), automatically in force under Trinity County's own EVERGREEN adoption clause: TCC 15.04.080(B) adopts 'the California Electrical Code, 2001 Edition...and all subsequent editions thereof...by this reference' -- meaning the current state code cycle applies without the county needing to pass a new ordinance each cycle. 82% · codified ordinance
• Which building code edition is in force? 2025 California Building Code (Title 24, Parts 1 & 2), via the same evergreen clause: TCC 15.04.080(A)/(F) adopts 'the California Building Code, 2001 Edition...and all subsequent editions thereof.' 82% · codified ordinance
• Are there local amendments to any of the above? Yes. Local amendments found in Title 15 include: 15.04.090 (special snow-load venting rule), 15.04.131 (mobile home installation), Ch. 15.08 (Sign Ordinance), Ch. 15.16 (local Floodplain Management ordinance), Ch. 15.25 (Limited Density Rural Dwellings, which independently cross-references CBC Chapter 7A, CRC R302, PRC 4290/4291 and the county's own Fire Safe Ordinance for fire safety -- TCC 15.25.040(X)), and Ch. 8.30 (the 1991 Fire Safe Ordinance itself, a wholesale local wildfire/access/water-supply/signage code). 88% · codified ordinance
• What is the installation judged against? The current (evergreen-adopted) CBC/CEC/CMC/CPC/Energy Code/Building Standards Administrative Code as locally amended by Title 15 (snow venting, mobile homes, signs, floodplain, LDRD), plus the county's own Fire Safe Ordinance (Ch. 8.30, TCC, implementing PRC 4290) for site access, water supply and defensible space, plus -- for the Limited-Density-Rural-Dwelling alternative-standards path specifically -- an explicit cross-reference to CBC Chapter 7A and CRC R302 (TCC 15.25.040(X)). 80% · codified ordinance (synthesis)

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 Trinity 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 by default under the evergreen-adopted 2023 NEC Section 690.12 (via TCC 15.04.080(B) and the 2025 CEC) -- Trinity County has no document of its own, positive or negative, addressing rapid shutdown; unlike Mariposa County (whose detailed E-Inspection self-certification form conspicuously omits 690.12 while citing everything around it), Trinity County simply has no solar-specific inspection or self-certification document at all to check for the citation. 65% · codified ordinance (inference)

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 authority specify placard wording of its own? No. No Trinity County document specifies its own placard wording for solar equipment. 70% · department documents (control-checked absence)
• Does it specify letter height, colour or material? No. No letter height, colour or material is specified by the county anywhere. 70% · department documents (control-checked absence)

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.

• Is there a separate ESS permit or inspection? No. There is no separate ESS permit or inspection, and no ESS/battery/storage fee line exists anywhere in the Building section of the county's fee ordinance -- a control-checked absence (0 hits for 'battery'/'storage'/'ESS' in the Building fee section, against dozens of 'electrical' hits in the same section and a 0-hit fabricated 'zzqqx' control). 75% · fee schedule (control-checked absence)
• Is a ground mount treated as a structure? Effectively yes, by inference. The Building Permit Application's own permit-type checkboxes list 'Accessory Structure' as a distinct category from 'Dwelling'/'Electrical,' so a freestanding/ground-mount PV array would most likely be filed and reviewed as an accessory structure, subject to the applicable zoning district's general accessory-building height cap (25 ft in R/A/H/RR districts, TCC 17.30.050(E)) and yard-setback rules (e.g. 20 ft front / 6 ft side / 20 ft rear in the Rural Residential district, TCC 17.15.080-.100) -- there is no PV-specific ground-mount ordinance or exemption anywhere in Title 17 (control-checked: 0 solar/photovoltaic hits relevant to ground mounts across all 63 zoning chapters). 68% · 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? Phone. Call (530) 623-4890 and leave a message with the building permit number, requested date, type of inspection, name, and address. 90% · department page
• How much notice is required? At least 24 hours generally (per the standard 'REQUIRED INSPECTIONS' notice in the Building Permit Application). For same-day scheduling on the fixed day assigned to a given geographic area, the message must be left before 8:00 am (per the Building Division page) or requests must be 'called in prior to 7:30 AM on the day of inspection' (per the application packet) -- the two county documents give slightly different same-day cutoff times, reported as written rather than resolved. 80% · department page + application form
• Are same-day or AM/PM windows offered? No AM/PM window system. Instead, most areas of the county are inspected on a fixed WEEKLY DAY-OF-WEEK-BY-GEOGRAPHIC-AREA schedule (e.g. Monday: Local/Trinity Center/Coffee Creek/Lewiston/Poker Bar/Deerlick Springs/Hayfork/Hyampom/Wildwood; Tuesday: Local/Douglas City; Wednesday: Local/Junction City/Del Loma/Hawkins Bar/Burnt Ranch/Salyer/Denny/Big Bar; Thursday: repeats Monday's areas; Friday: Ruth/Zenia/Mad River/Van Duzen/Kettenpom/Hettenshaw). A same-day inspection can be added to that day's route if requested before 8 am / 7:30 am. 80% · 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, self-performed in-house. The county's own Building Permit Application names an in-house Chief Building Official/Plan Checker (Cody Smith) and Building Inspector I (Miles Tralle), both on county letterhead/phone; the Building Division page names the same office with a generic county email; no delegation-firm name, contract, or portal was found anywhere across every tell checked (staff titles, email domains, no permitting portal exists to check a vendor/firm subdomain on, and the fee ordinance carries no staffing appendix). 88% · department application form + department page
• If delegated, to whom? N/A for Building/Electrical -- not delegated (see Q52). For the WILDFIRE/DEFENSIBLE-SPACE component specifically, review is performed by CAL FIRE's Trinity Unit (a named Battalion Chief signs the county's CAL FIRE Acknowledgement Form), but final sign-off authority is retained by the Trinity County Building Department, which must approve the CAL FIRE conditions before finaling the permit. 80% · department application form

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 new dwelling (the county's documents are written for new construction, not solar-only retrofits): Foundation -> Underfloor Plumbing -> Roof Sheathing (nailing) -> 4-Way Inspection (Framing, Rough Electrical, Rough Plumbing, Mechanical) -> Insulation -> Lath/Wallboard -> Final Inspection -> Certificate of Occupancy. For a stand-alone solar addition to an already-occupied home, the county's documents do not separately state a shortened sequence; a single electrical/final inspection is the most likely practical outcome but this is not stated explicitly (see Q61). 70% · department application form
• Is a rough-in or mid-roof inspection required? Yes, for new-dwelling construction (Roof Sheathing nailing inspection, and the '4-Way' inspection which includes Rough Electrical, are both distinct pre-final stages). Not stated separately for a solar-only retrofit to an existing dwelling. 60% · department application form

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? No dedicated solar inspection checklist is published. The closest document is the general 'REQUIRED INSPECTIONS' list in the Building Permit Application packet, which is written for new-dwelling construction generally (foundation through final/CofO), not a solar-specific checklist of the kind Mariposa County (E-Inspection form) or Manteca/Manhattan Beach publish. 75% · department checklist (control-checked absence of a solar-specific version)
• What must be on site at inspection? Approved plans must be on the job (the inspector 'may not be able to do the inspection' without them), the yellow permit card posted at the entrance to the property, the brown/orange card posted at the work site, and a ladder provided if needed for the inspection type (roof, attic, etc.). 85% · department application form

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? For new construction: a Final Inspection, followed by a Certificate of Occupancy ('issued after final inspection when the dwelling complies with the provisions of all applicable codes and ordinances and is ready for permanent occupancy...required prior to obtaining permanent utility connections'). It is not stated whether a fresh Certificate of Occupancy, a bare 'final' card, or a letter is issued for a rooftop PV addition to an ALREADY-occupied existing dwelling -- the county's only documented sign-off process is written for new-dwelling construction. 55% · department application form (inference)
• Who notifies the utility for PTO? Not explicitly stated by either the county or Trinity PUD. The process is customer/installer-initiated: Trinity PUD's own Upgrade Service page describes the customer contacting the Building Department first, then Trinity PUD, signing a Contract, and only then does 'Trinity PUD installing the electric power' occur after 'the Trinity County Building Department has to inspect and approve your electrical panel' -- implying the CUSTOMER/INSTALLER drives the sequence rather than the county affirmatively notifying the utility, but no document uses the word 'notify' or names a specific party responsible for that step. 55% · utility's own document (inference)
• Is there a re-inspection fee? No dedicated Building-Division re-inspection fee line was found in the 2023 fee ordinance's Building section; a failed/return inspection would most likely be billed under the Building Permit sub-table's general 'all inspections at actual cost per hourly rate' line ($129/hour, fully-weighted column; $100/hour original). (Note: the SAME fee document has a distinct, explicit 'Re-inspection fee' of $342/$164 -- but that line sits under the ENVIRONMENTAL HEALTH section of the schedule, not Building, and does not apply to a solar/building permit.) 68% · fee schedule