City of Lakewood

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, in name — City of Lakewood is the permitting authority of record for residential solar, but building/electrical plan check and inspection are performed by the Los Angeles County Department of Public Works (DPW) Building and Safety Division (BSD) under a services contract. LA County DPW's own Building Codes page lists Lakewood among its 'Contract Cities' (properties in city boundaries only), alongside Artesia, Cerritos, La Mirada, etc. Fire jurisdiction is the LA County Fire Department (LACoFD), which also lists Lakewood as a contract city (Division 4). 92% · AHJ list / county department page
• What does this authority permit itself, and what does it delegate? Delegated — both building and electrical plan check/inspection for residential solar are performed by LA County DPW Building and Safety Division under contract; fire plan review/inspection is performed by LACoFD (also under contract), except that LACoFD explicitly retains ESS/BESS and certain BIPV fire review itself rather than delegating it further to Building & Safety. 90% · AHJ program guide
• Is a permit required for a residential rooftop PV system? Yes — a permit is required for residential rooftop PV. LA County Building Code Chapter 68 creates a standardized 'combined solar energy permit' covering building and electrical work for qualifying small residential rooftop systems. 95% · adopted building code
• Is there a separate electrical permit, or is it combined? Combined — LA County Building Code Section 6804 issues a single 'combined solar energy permit' covering both building and electrical work for qualifying systems; a separate plumbing permit is only pulled if solar water heating is also involved. 92% · adopted building code
• Is a HOA or architectural approval required first? No separate HOA/architectural-review-board approval is required by the City before a solar permit; however, the City itself imposes detailed objective design/screening conditions (conduit routing and color-matching, roof-material matching, screening for visible flat-roof arrays) as conditions of the ministerial building permit — not a discretionary ARB process. 70% · authority checklist
• Is a wind or windstorm certification required? Yes, but only for ballasted (non-attached) or ground-mounted systems — these require a seismic design per SEAOC PV1-2017 and a wind design per SEAOC PV2-2017 (or a wind-tunnel test under ASCE 7), per the County's Plan Review List. Standard flush-mounted, attached residential roof arrays that meet the prescriptive Structural Criteria checklist (Attachment E) are NOT required to submit a separate wind certification. 82% · county plan-review checklist
• Is a Specific Use Permit or Council approval ever required? No — no Specific Use Permit, conditional-use permit, or City Council approval was found to be required for a qualifying residential rooftop PV system. Only a building/electrical (or combined solar) permit is described in every submittal document reviewed, consistent with the statewide ministerial-review mandate for residential solar under Gov. Code §65850.5/§65850.52. 70% · authority checklist (absence)
• Is there a system-size cap on residential generation? Historically 10 kW AC for photovoltaic (30 kW thermal for solar water/pool heating) under LA County Building Code Chapter 68 (2015 text), but the County's own Affidavit form was updated 9/1/23 to cover 'Expedited Permitting of Residential Rooftop Solar Energy System Installation UP TO 38.4 KW AC NAMEPLATE RATING' — indicating the expedited-permitting size ceiling has since been raised to 38.4 kW AC, consistent with the statewide expansion of expedited solar permitting thresholds. 70% · county affidavit form (2023 revision)

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 — the City's own solar application form lists 'Licensed Contractor' or 'Owner-Builder' as the two options for who performs the work, and the County's Attachment A submittal package requires 'Form A, B, or C Affidavit' depending on whether a licensed contractor or the property owner is pulling the permit. 85% · authority permit application form
• Must the contractor be registered with this authority before applying? Yes for out-of-city contractors — Lakewood requires a business license before a contractor may work in the city, and publishes a specific 'Business License Application — Out-of-City Contractor' form distinct from the standard business license application. 75% · authority department page
• Is a homeowner permitted to self-install and self-permit? Yes — Lakewood's own solar permit application explicitly offers an 'Owner-Builder' work-declaration option, and the LA County Affidavit (Form A) has a distinct 'Property Owner's Declaration' section for self-installation. 88% · authority permit 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 submittal includes: completed permit application form; eligibility checklist for expedited permitting; a completed Standard Electrical Plan (single-line diagram); a roof plan showing PV panel layout plus fire-safety items (roof access point, access pathways, fire classification, label locations); completed Structural Criteria worksheet with supporting documentation; and a signed contractor/owner affidavit (Form A/B/C). Lakewood's own checklist additionally requires elevations, manufacturer spec sheets, and a completed one-line electrical diagram (Exhibits C/D). 90% · adopted building code manual attachment
• How many copies, and in what format? Two (2) hardcopy sets of plans (minimum 11x17) for city counter submittal, per Lakewood's own checklist; electronic submittal is also available by emailing MyPlans@lakewoodcity.org, or — per the county — through LA County DPW's Building and Safety Online Plan Check (BSOP) system or the EPIC-LA portal. 75% · authority checklist (dated 9/18/15)
• Is a site plan required, and what must it show? Yes. Lakewood's own checklist requires a site plan (min 11x17) showing: project address, north arrow, scale, roof plan, solar panel locations with dimensions from edges, panel dimensions, dimensioned disconnects/equipment on the roof, and the path of all wiring, plus a tree-location plan and full building elevations. The County's parallel requirement (Attachment A) is a roof plan showing roof layout, PV panels, and required fire-safety items (roof access point, access pathways, fire classification, label locations). 88% · authority checklist
• Is a one-line / three-line diagram required? Yes — a completed standard (one-line/three-line) electrical diagram is required. Lakewood's checklist requires 'Completed standard electrical diagram for small-scale, single-phase PV systems' (with worked examples as Exhibits C and D); the County's parallel Attachment A requires 'A completed Standard Electrical Plan,' and the 2023 County Plan Review List item 38 requires a 'Single Line Diagram' showing array configuration, conduit and conductor sizes with derating calculations. 92% · authority checklist + county plan-review list
• Are string and conductor calculations required? Yes — the County's Solar PV System Plan Review List requires inverter information (model, max DC input), PV module information (Voc, Isc, max series fuse), array information (modules in series/parallel), and wiring/overcurrent protection sized with derating factors (items 39-42, 47), consistent with NEC 690 conductor-sizing requirements. 88% · county plan-review checklist
• Is a structural PE stamp required, and at what threshold? Conditional, not a flat threshold. Systems that pass the County's prescriptive 'Structural Criteria for PV Systems' one-page checklist (flush-mounted, ≤4 psf, roof coverage ≤50%, anchor spacing within Table 1) need NO engineer's stamp. If any item fails the checklist, 'project-specific drawings and calculations stamped and signed by a California-licensed Civil or Structural Engineer' are required. Ballasted and ground-mounted systems always require engineered/stamped structural calculations (Chapter 68 §6807.3; Plan Review List items 18-35). 85% · adopted building code manual attachment
• Is an electrical PE stamp required, and at what threshold? No PE stamp is required for a standard residential PV system that uses the County's Standard Electrical Plan; the plans instead must 'bear the signature and license information of the person preparing the documents' (typically a C-10 electrician or the installing contractor), per the County's 2023 Plan Review List. No explicit kW threshold triggering a mandatory electrical PE stamp was found in the documents reviewed. 60% · county plan-review 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? Two portals depending on permit type: (1) EPIC-LA (LA County's EnerGov-based self-service portal, epicla.lacounty.gov) is now the portal Lakewood directs residential rooftop-solar 'Express Solar Roof Mount Permit' applicants to use directly; (2) LA County DPW's separate 'Building and Safety Online Plan Check' (BSOP) system and/or email to MyPlans@lakewoodcity.org are the routes described in Lakewood's own (older) solar checklist for other/non-expedited submittals. 88% · authority department page (2024 crawl)
• Can the whole application be completed online? Yes — EPIC-LA supports the entire residential Express permit workflow online: project location entry, description, contact/license info, itemized fee application, required-document upload, e-signature, review/submit, invoice payment, and inspection requests are all done within the same self-service portal per LA County's own step-by-step guide. 90% · county portal user guide
• What does a residential solar permit cost? The combined (building + electrical) permit fee for a qualifying small residential rooftop PV system is capped at $500 by LA County Building Code, unless modified under Gov. Code §66015. This is a statutory ceiling, not a confirmed current line-item fee — Lakewood/County's current master fee schedule was not located. 80% · adopted building code
• How is the fee calculated? Valuation-based under the general fee schedule (Building Code §107 / Electrical Code §82-8), but capped for qualifying small residential rooftop PV at a flat $500 combined-permit ceiling per Government Code §66015. 75% · adopted building code
• Is there a separate plan-check fee? No separate plan-check fee identified for the expedited residential solar permit — Chapter 68's $500 ceiling is described as a single 'combined permit fee' covering the work, and Attachment A's fee section does not carve out an additional plan-check line item. 65% · adopted building code manual attachment

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? 1 to 3 business days for a qualifying (expedited-eligible) small residential rooftop solar application. No figure was found for a standard (non-expedited) track application, e.g., ballasted or ground-mount systems that fail the eligibility checklist. 90% · adopted building code
• How long is an issued permit valid before it expires? Plan check is valid for one year from Lakewood's own (2015-dated) checklist; additional fees may apply for renewal after that. The County's plan-review list separately references a general application-expiration rule (Building Code §106.4.1.1) without stating the exact duration on the document itself. 60% · authority checklist (dated 9/18/15)
• Which utility handles interconnection here? Southern California Edison (SCE) — Lakewood sits entirely within SCE's Southern California service territory; no municipal or irrigation-district electric utility was identified for Lakewood. This was not confirmed via a Lakewood-specific enumeration (SCE's own service-area page returned no address-level city list to automated retrieval); it is inferred from SCE's territory description and the absence of any city-run electric utility on Lakewood's own utility pages (which cover only water). 65% · utility handbook + inference (see why)
• Where does the utility sit in the sequence? Parallel, with PTO gated on the AHJ's sign-off. A customer may submit SCE's interconnection application independently of (and typically alongside) the building/electrical permit process, but SCE will not schedule a required witness/commissioning test, nor issue Permission to Operate, until it receives 'a copy of the Electrical Inspection Release from the appropriate Authority Having Jurisdiction (e.g., final inspection job card from the local building and safety department).' 85% · utility interconnection handbook

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 cycle) — LA County DPW's current Codes page states 'Current Codes Effective January 1, 2026' includes the '2026 County of Los Angeles Electrical Code (Title 27)' which 'incorporates local County of Los Angeles amendments and the respective State and model codes.' California's 2025 statewide code cycle (effective 1/1/2026) adopts NFPA 70 2023 as the NEC base for the 2025 CEC. I was not able to open the underlying Title 27 code text itself (an 81 MB scanned PDF with no usable text layer) to confirm '2023 NEC' verbatim; a boilerplate purchasing note elsewhere on the same DPW page still describes the prior cycle ('2022 California Electrical Code with 2023 LA County Amendments'), which is stale relative to the 1/1/2026 effective-date banner on the same page. 70% · county department page
• Which building code edition is in force? 2025 California Building Code as locally amended — the '2026 County of Los Angeles Building Code (Title 26)' and '2026...Residential Code (Title 30)' took effect January 1, 2026 per LA County DPW's current-codes listing. 85% · county department page
• Which fire code edition is in force? 2023 LACFC (a locally amended version of the 2022 California Fire Code), per LACoFD's own Sept. 2023 guidance documents — the most current dated fire-code citation I could confirm. LACoFD's Fire Prevention documents are dated 2023-09-01 and I could not confirm whether a newer fire-code cycle (matching the 2026 building/electrical cycle above) has since been adopted. 70% · AHJ program guide
• Are there local amendments to any of the above? Yes — extensive local amendments exist at every level: LA County Building Code Chapter 68 is itself a wholesale local addition governing expedited solar permitting; LA County publishes numbered Building Code Manuals (e.g., BCM 6807, BCM 1512) that further interpret/amend state code for solar and reroofing; and the LACFC contains LA-County-specific amendments to the state Fire Code (e.g., §1207.11 ESS provisions, §509 disconnect placarding) documented at length in LACoFD's own guide. 92% · adopted building code + AHJ program guide
• What is the installation judged against? The LA County Building Code (Titles 26/30, incorporating the state code with local amendments), LA County Electrical Code (Title 27), and 2023 LACFC — plus County Building Code Manuals 6807 (expedited solar) and 1512 (reroofing with solar) and LACoFD's ESS/PV/Disconnects guide for fire-specific items. 85% · county department page

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? The County's own 2023 Plan Review List cross-references LA County Building/Residential Code sections 3111.3.4 / R324.6 for required roof access points and clear pathways, and Attachment A points installers to the State Fire Marshal's Solar PV Installation Guide for pathway examples — but I could not open the actual LA-County-amended setback/pathway dimensions themselves: library.municode.com for LA County's Title 26/30 returns a JavaScript shell with no usable text to automated retrieval. 50% · county plan-review checklist (cross-reference only)

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. The County's 2023 Plan Review List requires 'a rapid shutdown function that controls specific conductors in accordance with 2022 CEC Article 690.12(A) through (D)' (item 50), and LACoFD's checklist separately requires a placarded rapid-shutdown/hazard-control-system initiation device as part of its disconnect placarding system. As the Electrical Code cycle updates to the 2025 CEC (2023 NEC base) effective 1/1/2026, the same substantive rapid-shutdown requirement is expected to carry forward under NEC 690.12, though this specific citation update was not independently confirmed in county text. 85% · county plan-review checklist

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? At minimum: (1) LACoFD's 'F.D. – ELECTRICAL BLDG DISCONNECT #X of Y' placards at every disconnect/panel that must be operated to de-energize the structure from any power source (utility, PV, ESS, generator, etc.), plus matching panel-interior placards identifying specific breakers; (2) NEC/CEC-required PV system labels per the County's plan-review list — DC disconnect PV-source-system-attributes sign, AC point-of-connection sign, alternative-power-system switch sign, junction/combiner-box PV-circuit signs, raceway PV-circuit markings, and a permanent directory/plaque denoting all power sources on the premises (2022 CEC Art. 690.13 / 705.10). 92% · AHJ program guide (fire) + county plan-review list (electrical)
• Does the authority specify placard wording of its own? Yes — LACoFD prescribes exact verbiage: exterior placards read 'F.D. – ELECTRICAL BLDG DISCONNECT # X of Y', and companion panel-interior placards use a '#X' designation, with 'X' and 'Y' values assigned per a defined numbering procedure (utility service is always '#1'). 95% · AHJ program guide
• Does it specify letter height, colour or material? Yes, in detail. Exterior placards: minimum 2 in. tall x 3.5 in. wide, weather-resistant plastic, verbiage engraved, red letters on a yellow background, solid all-capitals Arial font (minimum size 24, with 'F.D.' and '#X of Y' in bold minimum size 28), attached with permanent, material/weather/surface-compatible epoxy. Panel-interior placards: minimum 7/16 in. tall x 3/4 in. wide, same color scheme, bold Arial minimum size 24. 95% · AHJ program guide
• Is a site plan / facility map placard required, and what must it show? Yes — a directory/placard system is required identifying and locating every power source and its disconnect on the premises (functionally the NEC 705.10 'permanent plaque or directory' requirement), implemented locally through LACoFD's numbered '#X of Y' placarding system, which must 'account for all power sources capable of supplying electricity to a structure's electrical circuit(s).' 85% · AHJ program guide
• Does the UTILITY specify placards beyond the AHJ's? Yes — SCE requires its own equipment signage beyond the AHJ's, per its Electrical Service Requirements (ESR): equipment must be labeled with permanently attached, machine-engraved laminated phenolic (or equal) tags, typically reading 'Grid Side' or 'Generation Side' at isolation devices and net-output-generation metering, with acceptable font sizes of 3/8 in. to 1 in. 80% · utility interconnection handbook
• Where must the labels be placed? LACoFD placards: exterior placards go on or immediately adjacent to each panel/enclosure or standalone disconnect switch that must be operated; panel-interior placards go inside the panel to identify specific breakers/switches when more than one must be operated within the same enclosure. AC disconnects themselves must be within 6 ft of the main service panel, on the same wall plane, unobstructed by walls/gates/fences/vegetation/architectural features (2023 LACFC §509.3), and within sight of the inverter. 88% · AHJ program guide

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? The AC disconnect must be within sight of the inverter and readily accessible (County Plan Review List item 45), and — together with all other power-source disconnects (utility, PV, ESS, generator) — must be located within 6 ft of the main service panel, on the same wall plane, not separated from the main panel by walls, gates, fences, vegetation, or architectural features, per 2023 LACFC §509.3. For an ESS specifically, a disconnecting means for one- and two-family dwellings must be located at a readily accessible location OUTSIDE the building. 90% · AHJ program guide + county plan-review list
• Must equipment be on a specific approved list? Yes — PV modules must be listed per the Electrical Code (Chapter 68 §6807.4); inverters must carry UL 1741 listing (or be covered within a UL 9540 listing); solar thermal collectors must be SRCC-certified or otherwise approved-listed (§6807.5); and ESS units/components must carry UL 1973/1989/9540 listing per the County's Plan Review List. 90% · adopted building code
• Are batteries permitted, and under what conditions? Yes, but NOT through the expedited/Express PV permitting track — the County's Eligibility Checklist for expedited PV permitting explicitly requires the 'solar system is utility interactive and without battery storage.' Battery/ESS installations are permitted through the standard permitting process subject to extensive conditions: UL 9540 listing, maximum 20 kWh per individual ESS unit, maximum 80 kWh aggregate per site (and per location-type on site), prohibition on installation inside dwelling/sleeping units, closets, bathrooms, or basements (garage or exterior/outdoor locations only), 3-ft separation between ESS units, 5-ft separation from lot lines/openings/combustibles, 10-ft separation from vegetation, vehicular-impact protection where applicable, and heat-detection/notification when installed in an attached garage. 92% · AHJ inspection checklist
• Is there a separate ESS permit or inspection? Yes — LACoFD performs a separate ESS-specific plan submittal (Fire Prevention Division review) and field inspection in addition to the Building & Safety building/electrical permit and inspection; this is NOT delegated to Building & Safety the way conventional roof-mounted PV is. 90% · AHJ program guide
• Is a ground mount treated as a structure? Yes — a ground-mounted solar array is treated as a structure requiring its own structural plans/calculations covering foundation design, member sizing, and setback compliance from ascending/descending slopes, per the County's Plan Review List (items 30-35). A limited exception applies to one- and two-family dwellings where no part of the system exceeds 72 in. above grade on a slope no steeper than 3:1, which requires only a site review and electrical plan check. 85% · county plan-review checklist
• Is there a local rule on service upgrades or busbar sizing? Yes — for the expedited/Express residential PV track, the County's Eligibility Checklist requires the system be 'interconnected to a single-phase AC service panel of nominal 120/220 Vac with a bus bar rating of 225 A or less,' connected to the load side of the utility distribution equipment. Systems exceeding this (or using supply-side/line-side connections) fall outside the expedited path and are reviewed under the standard process, which applies the 120%-busbar-rule methods of 2022 CEC §705.12(B)(3). 85% · adopted building code manual attachment
• Is a specific mounting system or attachment spacing required? Yes — LA County's prescriptive Structural Criteria (Attachment E / BCM 1512 Attachment A) specify a maximum horizontal anchor-spacing table by roof slope and rafter spacing (e.g., 2'-0" on 24" o.c. rafters at flat-to-6:12 slope for PV arrays ≤4 psf), a required 2"-10" gap between module underside and roof surface, minimum 5/16" lag-screw anchors with 2.5" rafter embedment (or an LA-County-approved alternative), and a rule that the array may cover no more than half of the total roof area. 90% · adopted building code manual attachment

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? Two separate booking paths: (1) Building & Safety inspections are requested through the EPIC-LA portal's 'Request Inspection' menu (or by contacting the local B&S office by phone for non-EPIC-LA permits); (2) LACoFD ESS/PV/disconnect inspections must be booked by phone, calling the jurisdictional LACoFD Fire Prevention regional inspection office directly, followed by an email confirmation of the request. 85% · county portal guide + AHJ checklist
• How much notice is required? Minimal — LA County Attachment A states inspection requests received during business hours are 'typically scheduled for the next business day,' with a maximum five-business-day window if next-day is unavailable. No separate minimum-notice figure was found published for LACoFD's fire inspection scheduling (it is booked by direct phone call/email rather than a stated lead time). 75% · adopted building code manual attachment

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 — the City of Lakewood does not perform its own final solar inspection; the building/electrical combination inspection is performed by LA County DPW Building and Safety Division under the city's services contract, and a separate ESS/disconnect-placarding fire inspection (where applicable) is performed by LACoFD, not city staff. 88% · county department page + AHJ program guide
• If delegated, to whom? Los Angeles County Department of Public Works, Building and Safety Division (for the building/electrical combination inspection); Los Angeles County Fire Department, Fire Prevention Division (for ESS, BIPV, and electrical-disconnect placarding inspection). 88% · AHJ contracting page

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 expedited residential PV system: a single combination inspection covering structural, electrical, and plumbing components ('One inspection shall be required for the system' — Chapter 68 §6806.2), performed by Building & Safety. Where an ESS or disconnect-placarding condition applies, a separate LACoFD inspection is required in addition, and the applicant must have digital proof of the Building & Safety permit/inspection sign-off in hand before requesting the LACoFD inspection. 85% · adopted building code + AHJ checklist
• Is a rough-in or mid-roof inspection required? No — for the expedited/Express residential PV permit, only one (final/combination) inspection is required; there is no separate rough-in or mid-roof inspection stage described. 85% · adopted building code

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 — LA County publishes a dedicated 'Attachment F – Inspection Guide for PV Systems' (a 20-point field checklist), and LACoFD publishes its own 5-page 'Inspection Checklist for Group R-3/R-4 ESS, PV, and Electrical-Disconnect Placarding.' 95% · adopted building code manual attachment
• What must be on site at inspection? Building & Safety inspection: the approved plans on site, safe means to access the roof, personnel on site familiar with the installed system, interior access to verify required CO/smoke alarms, and all PV AC/DC disconnects/breakers placed in the open position; the inspector may also require photo/video evidence of 10% (minimum two) of the roof attachment points. LACoFD inspection: digital proof of the Building & Safety construction permit (e.g., an EPIC-LA/SolarAPP+ permit record and any inspection checklist issued with it), all required disconnect placarding already in place, and Fire Prevention inspection fees already paid — cut sheets for ESS units/inverters must be available on request. 90% · adopted building code manual attachment + AHJ checklist
• Does the inspector verify labels and listings? Yes, extensively. LA County's Inspection Guide for PV Systems (Attachment F) directs the inspector to verify PV module model/quantity/location against approved plans and spec sheets, equipment listing/labeling (modules, optimizers, combiners, inverters, disconnects, load centers), and 'PV system markings, labels and signs according to the approved plan.' LACoFD's own checklist separately verifies disconnect placarding (size, color, font, verbiage, placement) at inspection. 92% · adopted building code manual attachment

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 LACoFD inspection 'serves as an Operational Permit at a R-3/R-4 Occupancy' (on condition other AHJs also pass it). For the Building & Safety side, the documents describe final inspection approval/sign-off rather than issuance of a new Certificate of Occupancy for an existing dwelling (a CO is not typically reissued for a PV retrofit) — the closest schema match is 'Final.' 60% · AHJ checklist
• Who notifies the utility for PTO? Installer — SCE requires the customer/installer to submit interconnection documentation (single-line diagram, AC disconnect photos, and, when required, an Electrical Inspection Release from the AHJ) and, where a witness/commissioning test applies, to schedule it with SCE; SCE then issues the Permission to Operate (PTO) letter, typically 5-10 business days after its engineer returns the project to the Interconnection group. 80% · utility interconnection handbook
• How are corrections issued and cleared? At the plan-check stage: LA County issues a numbered 'Solar PV System Plan Review List' with the applicable correction items circled; the applicant marks the sheet/detail number addressing each circled item in the margin and resubmits the marked original plans plus two corrected sets and the review list itself; incomplete, unclear, or faded drawings are rejected outright. The plan-check engineer is available by phone/in person by appointment for clarification. A parallel field-correction process for post-inspection corrections was not found described in the documents reviewed. 70% · county plan-review checklist