City of Cupertino

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.

• What does this authority permit itself, and what does it delegate? Both (Building and Electrical are permitted directly by the City's Building Division); Fire plan review/inspection is delegated to Santa Clara County Fire Department 90% · department page
• Is a permit required for a residential rooftop PV system? Yes 95% · checklist
• Is there a separate electrical permit, or is it combined? Combined 75% · department page
• Is a HOA or architectural approval required first? No -- HOA/architectural approval does not appear to gate the solar permit. Several other Instant Permit types (Re-roof, Siding Replacement, Electrical Charging Station, etc.) are explicitly excluded when the property has 'HOA'; the 'Solar Permit with SolarApp+' line item carries no such HOA exclusion 55% · FAQ page (comparative inference)
• Is there a historic-district review? No dedicated historic-district review found for solar specifically -- other Instant Permit types (Re-roof, Siding Replacement) explicitly exclude 'historic properties'; the Solar Permit with SolarApp+ line does not carry that exclusion 55% · FAQ page (comparative inference)
• Is a wind or windstorm certification required? No 50% · checklist (absence)
• Is a Specific Use Permit or Council approval ever required? Only if the PV structure needs a setback/height variance from the R1 zoning ordinance, in which case a minor Residential Permit under CMC Section 19.28.090 is required; standard roof-mounted PV within setbacks needs no Council/SUP approval 85% · 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? Licensed contractor (California B, C-46, or C-10) for the SolarAPP+ Instant Solar Permit route, which is 'exclusively available to contractors registered with SolarAPP+'; homeowners may self-perform via the separate Owner-Builder route 88% · checklist
• Must the contractor be registered with this authority before applying? Yes, a City of Cupertino business license is required, but the FAQ specifies it is checked at final inspection, not necessarily at application: 'A final inspection cannot be scheduled until your contractor and all the sub-contractors...have obtained a business license from the City' 82% · FAQ page
• Is a homeowner permitted to self-install and self-permit? Yes, via the general Owner-Builder permit route (not via the contractor-only SolarAPP+ Instant Solar Permit) 75% · policy handout

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? Cost estimate/valuation; structural calculations (if weight/height threshold exceeded); manufacturer specs and installation instructions for all PV equipment; cover sheet with owner/APN/scope; site plan; roof or foundation plan; electrical single-line diagram; signage detail 92% · checklist
• How many copies, and in what format? Standard (non-SolarAPP+) route: 4 sets of plans plus supporting documents on a USB drive for structural calcs. Electronic submittal: PDF only, each drawing sheet as a separate landscape-oriented file named per the Drawing Index, uploaded 'unsecured' via ProjectDox 88% · department page
• Is a site plan required, and what must it show? Yes. Must show property boundaries and north arrow, location of the PV installation, electrical service, combiner box, inverter, AC/DC disconnects, junction boxes and battery banks; for ground mount, all structures, topography, driveway access, easements, utilities and septic/leach lines 95% · checklist
• Is a one-line / three-line diagram required? Yes 95% · checklist
• Are string and conductor calculations required? Conductor/conduit sizing is required ('indicate type and size of all conduit and conductors throughout the PV system'); a formal 'string calculation' is not separately named 65% · checklist
• Is a structural PE stamp required, and at what threshold? Yes -- structural calculations by a registered California design professional are required if the PV system exceeds 5 lb/sf, or exceeds 18 inches above the roof surface, or (ground mount) exceeds 5 feet in total height 95% · 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? Accela Citizen Access (ACA) for standard permits/payment/inspection scheduling; SolarAPP+ for the Instant Solar Permit application/approval step 92% · portal landing page
• Can the whole application be completed online? Yes, for the Instant Solar Permit route (SolarAPP+ approval -> upload to Accela Citizen Access -> pay -> permit auto-issues -> schedule inspection online), all without an in-person visit 88% · department page
• What does a residential solar permit cost? $450 flat for residential systems up to 15kW, plus $15 per additional kW above 15kW (multi-family/commercial tiers differ) 92% · fee schedule
• How is the fee calculated? Tiered (flat fee up to a kW threshold, then per-additional-kW above it) 92% · fee schedule
• Is there a separate plan-check fee? No -- the PV/BESS line items in Schedule D Table 3 are a single combined fee; a footnote states 'Fees identified in this Table consist of 50% Plan Review Fee and 50% Inspection Fee', so there is no separate stand-alone plan-check charge for residential PV 88% · 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? General route: 20-30 business days for initial plan review, 10-20 business days per subsequent review (stated as 'currently longer than normal'). SolarAPP+/Instant Solar Permit route: automatic/same-day issuance once documents and fees are complete 85% · department page
• Which utility handles interconnection here? Pacific Gas & Electric (PG&E) delivers/interconnects electricity for Cupertino; the community-choice generation provider is Silicon Valley Clean Energy (SVCE), which does not touch interconnection 90% · utility/CCA own page

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 95% · authority's own adoption history table
• Which building code edition is in force? 2025 California Building Code and 2025 California Residential Code (based on 2024 IBC/IRC), effective 1/1/2026 under Ordinance 25-2278 95% · authority's own adoption history table
• Which fire code edition is in force? 2025 California Fire Code (based on 2024 IFC), effective 1/1/2026 under Ordinance 25-2278 90% · authority's own adoption history table
• Are there local amendments to any of the above? Yes -- the City states it adopts Title 24 'with certain amendments' each cycle. Notably, a local reach-code amendment to the CEC/CalGreen (Ord. 19-2193, adopted 2/5/2020) requiring electric readiness was later REPEALED by Ord. 24-2265 (effective 4/9/2025) following the Ninth Circuit's decision on gas bans -- the repeal took effect before AB 130's 1 Oct 2025 freeze on new restrictive residential amendments, so AB 130 does not currently block Cupertino from re-adopting a reach code, it only blocks doing so between 10/1/2025-6/1/2031 88% · authority's own adoption history table
• What is the installation judged against? CRC Section R907 and CEC Article 690 (as currently the 2025 editions, per the 2025 code adoption) 90% · checklist

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 City's own PV checklist directs installers to roof-access pathway guidance in a CAL FIRE/OSFM 'Solar Photovoltaic Installation Guideline' -- but the linked document (osfm.fire.ca.gov/pdf/reports/solarphotovoltaicguideline.pdf) is a 2008 DRAFT (Title: 'DRAFT', created 20 Jun 2008), not a current, adopted standard. No Cupertino-specific numeric ridge-setback amendment was found; the applicable baseline is the 2025 CRC R907.7 / CFC solar provisions 55% · checklist (stale referenced link)

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 required per NEC 690.12 as incorporated into the 2025 California Electrical Code (based on 2023 NEC), effective 1/1/2026 85% · inference from adopted code edition

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? A disconnect placard at service equipment: 'green or red plastic engraved with 1/2 inch high white letters, permanently mounted on or immediately next to the panel door'; plus a standalone-system placard, or a directory/plaque indicating the location of the service disconnect and PV disconnect for grid-tied systems 92% · checklist
• Does the authority specify placard wording of its own? Yes, in substance (required content: standalone-system disclosure or service/PV-disconnect directory) though not a single verbatim script 80% · checklist
• Does it specify letter height, colour or material? Green or red plastic, engraved, 1/2 inch high white letters 92% · checklist
• Is a site plan / facility map placard required, and what must it show? The required site plan (not a separate 'facility map placard') must show property boundaries/north arrow and the location of electrical service, combiner box, inverter, AC/DC disconnects, junction boxes and battery banks; no additional NEC 705.10-style facility placard is separately named by the City 75% · checklist
• Where must the labels be placed? Placard permanently mounted on or immediately next to the service/panel door 90% · checklist

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 -- SolarAPP+ Instant Solar Permit explicitly covers 'roof-mounted solar photovoltaic panel installations, with or without energy storage systems'; the fee schedule prices Battery Energy Storage Systems as their own line item 90% · department page
• Is there a separate ESS permit or inspection? Yes -- Battery Energy Storage System has its own fee line ($655 for up to three units, $386 each additional) distinct from the PV fee line in the same fee schedule, indicating it is tracked/billed as a separable item even when bundled into one ISP application 82% · fee schedule
• Is a ground mount treated as a structure? Yes, treated as an accessory structure, but with a relaxed soils-investigation threshold: the Building Division FAQ lists 'ground mounted photovoltaic systems' among 'Non-Habitable Accessory Structures' (alongside trellises, gazebos, equipment sheds) that do not require a soil investigation report under the same rules as larger structures 75% · FAQ 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? Portal (Accela Citizen Access online scheduling); phone/email support available for technical help 90% · department page
• How much notice is required? At least 1 business day -- cancellations/reschedules must be made before 3:30pm on the business day prior to the scheduled inspection, or a re-inspection fee is assessed 80% · policy document
• Are same-day or AM/PM windows offered? Yes -- a confirmation email is sent before 7:30am on the day of inspection giving a two-hour time window 88% · 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 for building/electrical (performed by City Building Inspectors); Delegated to SCCFD for the fire-code component 90% · department page
• If delegated, to whom? Santa Clara County Fire Department, (408) 378-4010, for the fire-code component only 92% · 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? Via SolarAPP+/ISP: the fee 'covers two inspections for the same element,' implying a single inspection stage (with one covered re-check) rather than a multi-stage rough-in/final sequence; via the standard route, general residential sequence is rough electrical/MEP then final 65% · department page (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 -- a 'SolarAPP+ Inspection Checklist' is a required uploaded document for every Instant Solar Permit application/inspection 85% · department page
• What must be on site at inspection? A printed copy of the job card, the approved plan set, and supporting documents must be present at the job site 88% · policy document

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 passed 'Final Building' inspection record in Accela; no separate Certificate of Occupancy is issued for an existing single-family home) 60% · department procedure (inference)
• Is there a re-inspection fee? $266/hour (standard reinspection rate); Building Inspectors have discretion to issue one warning before assessing the fee 88% · fee schedule
• How are corrections issued and cleared? Corrections are noted by the field inspector on an inspection result/correction record; work must be corrected and pass a subsequent inspection (which may incur the reinspection fee) before the permit can proceed to final 65% · policy document (inference)