City of Mountain View

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% · department page
• Is a permit required for a residential rooftop PV system? Yes 98% · department page
• Is there a separate electrical permit, or is it combined? Combined 85% · department page
• Is a HOA or architectural approval required first? No (as a City permit precondition) 70% · ordinance / department page
• Is a wind or windstorm certification required? No 65% · ordinance
• Is a Specific Use Permit or Council approval ever required? No 65% · department page
• Is there a system-size cap on residential generation? No Mountain View–specific cap found; the applicable ceiling is the state/utility NEM ceiling of generating facilities under 1,000 kW (1 MW), per SVCE's program description. 60% · utility DG manual

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 80% · department page
• Must the contractor be registered with this authority before applying? Yes 90% · department page
• Is a homeowner permitted to self-install and self-permit? Yes 80% · department page

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.

• How many copies, and in what format? Digital only — no paper copies. All materials are uploaded online through ePermitsMV, or entered directly into SolarAPP+ for qualifying single-family systems. 60% · department page
• Is a one-line / three-line diagram required? Yes (inferred) 55% · utility DG manual

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? SolarAPP+ (for qualifying single-family roof-mounted PV, with or without battery/panel upgrade) and ePermitsMV (Avolve/ProjectDox-based portal at mountainview-ca-us.avolvecloud.com, for all other PV — multifamily, commercial, ground-mount, non-SolarAPP+ single-family). 95% · portal landing page
• Can the whole application be completed online? Yes 90% · portal landing page
• What does a residential solar permit cost? $500 city permit fee (SolarAPP+ single-family) plus a $35 SolarAPP+ program fee (or $60 with battery storage) plus a $16.29–$17.34 convenience fee = $541.29–$577.34 total. Non-SolarAPP+ single-family PV (via ePermitsMV) is subject to the same $500 city fee plus convenience fee only. Multifamily/commercial PV is valuation-based: ~$1,100 for a $50,000 project, ~$2,300 for a $250,000 project. 95% · fee schedule
• How is the fee calculated? Flat ($500 flat city fee for any single-family PV permit, SolarAPP+ or not) / Valuation (multifamily, commercial, and other non-single-family PV, per the general construction-valuation fee table) 88% · fee schedule
• Is there a separate plan-check fee? No (for single-family) 70% · 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? Same day (SolarAPP+, single-family) / 3 business days (single-family via ePermitsMV, and EV charging/PV on ADUs) / 5 business days (multifamily residential and nonresidential PV) 95% · department page
• Which utility handles interconnection here? PG&E (Pacific Gas & Electric) is the interconnecting/distribution utility and issues Permission to Operate. Silicon Valley Clean Energy (SVCE), a Community Choice Aggregator, is the default retail electricity/generation provider for most Mountain View accounts but does NOT perform interconnection — SVCE's own solar page tells customers to confirm NEM status with 'PG&E Solar Customer Service' and directs them into PG&E's Rule 21/NEM process. 90% · utility territory map + city source
• Where does the utility sit in the sequence? Parallel for the application (PG&E recommends submitting the interconnection application/single-line diagram early, even before the system is built, so it runs alongside the City permit) / After permit for final Permission to Operate — PTO requires the City's final electrical inspection clearance to be submitted to PG&E before the system can be energized. 75% · utility DG manual

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 (via the 2025 California Electrical Code, effective 1 Jan 2026) 78% · adopting regulation
• Which building code edition is in force? 2025 California Building Code and 2025 California Residential Code, adopted with local amendments, effective 1 Jan 2026 90% · adopting regulation
• Which fire code edition is in force? 2025 California Fire Code, effective 1 Jan 2026, located in Chapter 14 of the City Code 90% · adopting regulation
• Are there local amendments to any of the above? Yes 85% · ordinance
• What is the installation judged against? The 2025 California Building Standards Code (Building, Residential, Electrical, Mechanical, Plumbing, Energy, Fire, Green Building) as locally amended by the City of Mountain View (City Code Ch. 8, 14, 24), effective 1 Jan 2026 85% · ordinance

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? Not confirmed locally. Absent a locally-differing Fire Code amendment (which could not be retrieved — Akamai-blocked Chapter 14 PDF), the statewide 2025 California Fire Code's PV-system provisions (roof access pathways, ridge setbacks scaled to roof size/slope) would apply as the baseline in Mountain View. 45% · fire code + amendments

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, to the 2023 NEC (via the 2025 California Electrical Code, effective 1 Jan 2026) — NEC 690.12 rapid-shutdown has been a CEC requirement in every cycle since the 2017 NEC. 75% · 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? At minimum, the NEC Art. 690/705-mandated labels that come with the adopted 2025 CEC (rapid-shutdown label, PV system disconnect label, dual-power-source warning at the main service panel). Whether Mountain View requires anything beyond the code-mandated set could not be confirmed — the PV System Installation handout that would list any AHJ-specific placards is Akamai-blocked. 50% · ordinance / utility spec
• Is a site plan / facility map placard required, and what must it show? A utility-required Site Map Placard is triggered by PG&E when the AC disconnect is more than 10 ft from the PG&E electric meter (or when more than one AC disconnect is installed) — see Q42. A City-required facility/site-plan placard under NEC 705.10 specifically could not be confirmed; the PV handout PDF that would address it is Akamai-blocked. 65% · utility DG manual
• Does the UTILITY specify placards beyond the AHJ's? Yes. PG&E's 'AC Disconnect & Variance Requirements' spec requires: an AC Disconnect with signage on all non-inverter-based generators; sequential labeling ('1 of x, 2 of x') if more than one AC disconnect is installed; and a Site Map Placard if the AC disconnect is more than 10 ft from the PG&E electric meter (or a fusible AC disconnect installed within 10 ft, or a formal Variance). 88% · utility DG manual
• Where must the labels be placed? At/adjacent to the AC disconnect switch, which itself must be installed within 10 ft of the PG&E electric meter unless a Variance is granted; if it is sited farther than 10 ft (or a Variance applies) a Site Map Placard directing to the disconnect's actual location must be posted, and sequential numbering labels are required when more than one AC disconnect is installed. 85% · ordinance / utility spec

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? Within 10 ft of the PG&E electric meter, as a fusible AC disconnect, unless a Variance is obtained (triggered by conditions like a line-side connection above the main breaker, a transformer-rated meter panel, or a meter panel rated over 320 amps) — in which case a Site Map Placard showing the disconnect's actual location is required instead. 90% · utility DG manual
• Must equipment be on a specific approved list? At the utility level, yes — PG&E's online interconnection tool requires selecting generating equipment from 'an approved equipment listing' drop-down as part of the Standard NEM application. A separate City-of-Mountain-View approved-equipment list for building-permit purposes was not found. 60% · utility DG manual
• Are batteries permitted, and under what conditions? Yes — permitted. SolarAPP+ explicitly supports 'roof-mounted or building-integrated solar photovoltaic panel installations... with or without energy storage systems,' and the City's fee table has a distinct line for 'Solar installation and battery storage' ($500 + $60 SolarAPP+ fee vs. $35 for solar-only). Specific siting/fire-code conditions (kWh thresholds, UL 9540 listing, location) are in the PV System Installation handout, which is Akamai-blocked and could not be verified. 65% · fee schedule + department page
• Is there a separate ESS permit or inspection? No — battery storage is folded into the same solar permit/application (an added SolarAPP+ program fee of $60 vs. $35 for solar-only), not issued as a separate ESS permit. 80% · fee schedule
• Is a ground mount treated as a structure? Likely yes, though not stated in so many words. Ground-mounted systems are explicitly excluded from the SolarAPP+ prescriptive pathway and must go through the standard ePermitsMV building-permit process, which is consistent with (but does not on its own prove) treatment as a structure for zoning/setback purposes. 45% · ordinance

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 (Building inspections are booked online, 24 hours a day) 90% · department page
• How much notice is required? Effectively 1 business day: requests received by 3:00 PM on a business day are scheduled for the next business day; requests after 3:00 PM are scheduled for the second business day. 90% · department page
• Are same-day or AM/PM windows offered? AM/PM windows are offered (inspections are scheduled for AM or PM, not time-specific, Mon–Fri 8am–3pm); the City does separately offer 'Same-Day Permits' for some project categories but that is a permit-issuance feature, not an inspection-scheduling one, and PV is not listed among the same-day-permit categories. 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 92% · department page
• If delegated, to whom? N/A — not delegated. The City of Mountain View Building Division performs its own final solar inspection. 85% · department 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? SolarAPP+ path: a single final/site inspection, scheduled by the contractor at least one business day after the SolarAPP+ permit is approved. ePermitsMV path: plan review/corrections, then permit issuance upon fee payment, then a final inspection scheduled online — no intermediate stage is described for residential PV on either path. 70% · department page
• Is a rough-in or mid-roof inspection required? No (not found to be required) 55% · department page

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.

• What must be on site at inspection? For SolarAPP+ permits: 'Contractors are required to retain a copy of the [approved SolarAPP+] permit on-site.' For ePermitsMV permits, the approved permit/plans would be expected on-site per standard City practice, though this is not separately spelled out. 75% · department page

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 finaled/closed-out building permit) 55% · department page
• Who notifies the utility for PTO? Installer/contractor — after the City's final inspection passes, the contractor (or customer) submits the final electrical inspection clearance and any outstanding interconnection documents to PG&E, which then issues the Permission to Operate (PTO) letter. The customer must not energize the system before that letter is received. 70% · utility DG manual
• Is there a re-inspection fee? $437 per reinspection for a standard building 'no-show/not inspection-ready' reinspection (general fee schedule). For SolarAPP+ permit revisions specifically, the City charges a $207 reinspection fee plus a $6.30 convenience fee ($213.30 total). 88% · fee schedule
• How are corrections issued and cleared? The building plan checker returns comments/corrections to the applicant within 3 business days (single-family residential) or 5 business days (all other property types); once the applicant resubmits and City staff verifies all corrections, the permit is prepared for issuance. 85% · department page