City of Brentwood

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% · department page
• 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 68% · department page
• Is there a system-size cap on residential generation? 10 kW AC nameplate rating (or 30 kW thermal) for the expedited 'small residential rooftop solar energy system' definition; larger systems fall outside this streamlined chapter 95% · municipal code

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 62% · department page
• Is a homeowner permitted to self-install and self-permit? Yes 60% · handout (title only — PDF body unreadable, Akamai-blocked)

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? For the SolarAPP+ pathway: SolarAPP+ Approval Document, Completed Declarations Form (signed by contractor), Completed Residential Smoke and Carbon Monoxide Alarm Certification (signed by property owner), Completed Authorization to Act as Agent Form (signed by property owner). For the general (non-SolarAPP+) pathway: a building permit application plus the items on the city's 'small residential rooftop solar energy checklist' per BMC §15.12.030(A). 85% · department page
• How many copies, and in what format? Electronic only, via the eTRAKiT portal — PDF/document uploads, no paper copies accepted for the standard flow 78% · department page

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 (hosted by aspGov), at brent-trk.aspgov.com/eTRAKiT/ 90% · department page
• Can the whole application be completed online? Yes 88% · department page
• What does a residential solar permit cost? $285 base + $50.32 for each additional inverter (systems under 10kW) 58% · third-party aggregator
• How is the fee calculated? Tiered 55% · third-party aggregator

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? 3 days (if the application is complete) 90% · municipal code
• Which utility handles interconnection here? PG&E (Pacific Gas & Electric) 72% · third-party (solar installer)

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 70% · municipal code
• Which building code edition is in force? 2025 California Building Code (Title 24, Part 2/2.5) 95% · municipal code
• Which fire code edition is in force? 2025 California Fire Code (Title 24, Part 9), as amended by Contra Costa County Fire Protection District Ordinance 2025-14 90% · municipal code
• Are there local amendments to any of the above? Yes 88% · municipal code
• What is the installation judged against? The 2025 California Building Standards Code (incl. California Electrical Code), Civil Code §714(c), and Gov. Code §65850.5, per BMC §15.12.020's definition of a compliant small residential rooftop solar energy system 82% · 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.

Nothing recorded for City of Brentwood 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? Rapid shutdown is required as part of the adopted 2025 California Electrical Code (NEC Article 690.12), which BMC §15.04.010 adopts by reference; exact NEC edition base year not stated verbatim by the city (see q29) 55% · municipal code (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.

Nothing recorded for City of Brentwood on this step yet — 6 questions checked and found unpublished. The guidance above is general.

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.

• Are batteries permitted, and under what conditions? Yes — batteries/ESS are permitted; the city's SolarAPP+ permit type explicitly includes a 'Solar+Storage' subtype alongside plain 'Solar' 75% · department page
• Is there a separate ESS permit or inspection? Not clearly separate — ESS is folded into the same 'Solar+Storage' permit subtype rather than requiring its own distinct permit, for the SolarAPP+ pathway 62% · department page
• Is a ground mount treated as a structure? Likely yes, though not explicitly stated — ground-mount systems fall outside SolarAPP+ eligibility (which requires roof-mount on a permitted main dwelling with 'no trenching'), pushing them to the standard building-permit review where a ground-mount array would ordinarily be evaluated as an accessory structure 55% · department page (inference)
• Is there a local rule on service upgrades or busbar sizing? No Brentwood-specific busbar-sizing rule found; however, the SolarAPP+ pathway explicitly excludes any project that includes a main service panel upgrade — such projects must use the standard (non-SolarAPP+) permit path instead 65% · 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? Phone — Interactive Voice Request (IVR) system at (925) 809-7930 95% · department page
• How much notice is required? 1, 2, or 3 business days' notice (caller's choice of next business day, two business days out, or three business days out) 85% · 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 82% · municipal code
• If delegated, to whom? Contra Costa County Fire Protection District (for Fire Code enforcement/inspection aspects only) 78% · 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? For small residential rooftop solar: a single consolidated inspection (covering the whole system); additional re-inspection(s) only if the system fails 85% · municipal code
• Is a rough-in or mid-roof inspection required? No 82% · municipal 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.

Nothing recorded for City of Brentwood on this step yet — 3 questions checked and found unpublished. The guidance above is general.

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.

• How are corrections issued and cleared? For incomplete applications (pre-permit-issuance stage): the city issues a written correction notice detailing each deficiency 60% · municipal code