City of Milpitas

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 92% · department page
• Is a permit required for a residential rooftop PV system? Yes 95% · published handout
• Is there a separate electrical permit, or is it combined? Either 78% · published handout
• Is a HOA or architectural approval required first? No 88% · adopting ordinance
• Is a wind or windstorm certification required? No 58% · published handout
• Is a Specific Use Permit or Council approval ever required? Yes, conditionally: a building official may require a Use Permit if they find, based on substantial evidence, that the system 'could have a specific, adverse impact upon the public health and safety'; denial of the use permit is appealable to the Planning Commission. 88% · adopting ordinance
• Is there a system-size cap on residential generation? No absolute cap. Systems up to 10kW AC / 30kW thermal qualify as a 'small residential rooftop solar energy system' for the streamlined Ch.1.5 process; up to 15kW (manual online) or 15.1-38.4kW (SolarAPP+) can be permitted fully online; larger systems still permitted but must go through standard full plan review rather than the expedited track. 80% · published handout

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 88% · published handout
• Is a homeowner permitted to self-install and self-permit? Yes 88% · published 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? Plan set (min. 17x11) showing: project info (preparer, address/owner, description, applicable codes); plan view of PV location + roof framing (or site plan if not roof-mounted); mounting/roofing/weatherproofing details; electrical single-line diagram with total kVA; point of interconnection, main breaker/PV breaker/bus rating; conduit and conductor type/size; manufacturer cut-sheets and installation instructions for modules, mounting, combiner boxes, inverters, rapid-shutdown devices, disconnects; structural calcs by a CA-registered design professional if system weight exceeds 5 psf. 95% · published handout
• How many copies, and in what format? One (1) complete paper set, minimum ledger size (17in x 11in), for the manual/over-the-counter PV permit path; electronic submittal (PDF) via the City's ePlan portal for projects requiring full plan review. 82% · published handout
• Is a site plan required, and what must it show? Yes - plan view showing location of the PV installation and layout of existing roof framing members supporting the system, or a site plan if panels are not roof-mounted. 90% · published handout
• Is a one-line / three-line diagram required? Yes 93% · published handout
• Are string and conductor calculations required? No - not required as a separate calculation package; the handout only requires the type and size of conductors/conduit to be indicated on the plans, not formal string/ampacity calculations submitted at application. 58% · published handout
• Is a structural PE stamp required, and at what threshold? Structural calculations by a California-registered design professional are required if the total weight of the PV system exceeds 5 lbs/sq ft. 95% · published handout

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? City of Milpitas Online Permitting System (eplan.ci.milpitas.ca.gov), plus SolarAPP+ for eligible systems up to 38.4kW. 93% · portal landing page
• Can the whole application be completed online? Yes 90% · portal
• What does a residential solar permit cost? $450 flat for systems 15kW or less; $450 base + $15/kW above 15kW for larger residential systems (Miscellaneous Fees - Residential, 'Solar Permit' line). 90% · fee schedule
• How is the fee calculated? Tiered 88% · fee schedule
• Is there a separate plan-check fee? No 68% · 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? Solar falls under 'Miscellaneous Construction': 15 business days initial review, 12 business days on resubmittal. SolarAPP+ / eligible online ('ONL SOL') permits are issued same day / instantly instead of going through this queue. 83% · department page
• How long is an issued permit valid before it expires? 180 days from issuance before work must commence/proceed (California Building/Residential Code default, CBC/CRC 105.5); no Milpitas-specific amendment to this section was found. 50% · adopting ordinance
• Which utility handles interconnection here? PG&E is the interconnecting/distribution utility (owns the wires, administers Rule 21 interconnection, NEM tariff, and meters). Silicon Valley Clean Energy (SVCE), a Community Choice Aggregator, is the electric generation/procurement provider for Milpitas customers but does not perform interconnection engineering - that stays with PG&E. 88% · utility/CCA own page
• Where does the utility sit in the sequence? After permit (for energization/Permission to Operate); the interconnection application itself may be filed in parallel with the city permit. 78% · 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 85% · adopting ordinance page
• Which building code edition is in force? 2025 California Building Code (CBC), adopted by Ordinance No. 65.155, effective no sooner than January 1, 2026. 95% · adopting ordinance
• Which fire code edition is in force? 2025 California Fire Code (CFC), per the Fire Prevention Bureau's current Plan Review page, which links directly to the 2025 CFC text on ICC's site and states 'The Division enforces: 2025 California Fire Code (as amended by the Milpitas Municipal Code Title V, Chapter 300).' 68% · department page
• Are there local amendments to any of the above? Yes 95% · adopting ordinance
• What is the installation judged against? California Residential Code (CRC) and California Electrical Code (CEC) - both 2025 edition - plus the Milpitas Municipal Code, manufacturer installation instructions, and UL listings (1703/61730 modules, 1741 inverters, 2703 mounting). 93% · published handout

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? CRC R329.6 pathways/setbacks apply (min. two 36in pathways eave-to-ridge on hip roofs / one on single-ridge roofs per the handout's summary of R329.6.1; 18in ridge setback for arrays ≤33% of roof area, 36in for arrays >33%, per R329.6.2; exception for roofs ≤2:12 slope). The Fire Department's own (2008, still-linked) Photovoltaic Guideline adds more granular local direction: e.g. one 3ft pathway per roof slope on hip roofs, two 3ft pathways on single-ridge roofs, modules kept 1.5ft clear of hips/valleys, modules no higher than 3ft below the ridge for smoke ventilation, plus separate perimeter/pathway/array-size rules for 3+ unit residential and commercial roofs. 85% · fire department guideline

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 per CEC 690.12 (2025 CEC, California's amended adoption of the 2023 NEC). Initiation device must be at a readily accessible outdoor location [690.12(C)]; rapid-shutdown switch must be labeled per CEC 960.13(D)(2) within 3ft of the switch. 90% · published handout

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? Main service disconnect marking ('CAUTION: SOLAR ELECTRIC SYSTEM CONNECTED'); DC conduit/raceway/junction-box marking ('CAUTION: SOLAR CIRCUIT' or 'PHOTOVOLTAIC POWER SOURCE'); PV system AC and DC disconnect labels ('PV SYSTEM DISCONNECT', max voltage/current data); point-of-interconnection label (CEC 705.10); rapid-shutdown label and switch label; multiple-power-source plaque/directory ('CAUTION: MULTIPLE SOURCES OF POWER'); back-fed breaker warning label (CEC 705.12(B)(2)). 93% · published handout
• Does the authority specify placard wording of its own? Yes 90% · fire department guideline
• Does it specify letter height, colour or material? Minimum 3/8in letter height, capital letters, Arial or similar non-bold font, white lettering on a red background, reflective/weather-resistant material suitable for the environment (UL 969 recommended standard). 93% · fire department guideline
• Is a site plan / facility map placard required, and what must it show? Yes. A permanent plaque/directory denoting the location of each power-source disconnecting means is required at the service equipment location (CEC 690.56/705.10), marked 'CAUTION: MULTIPLE SOURCES OF POWER' where more than one source is present. Separately, PG&E requires a map (north arrow, site plan view, AC disconnect and meter locations) at the meter panel whenever the AC disconnect is more than 10ft away and out of line of sight from the meter. 88% · published handout + utility manual
• Does the UTILITY specify placards beyond the AHJ's? Yes. PG&E requires permanent signage affixed to the meter panel indicating an alternative source of generation is interconnected, and additional signage/a map for the AC disconnect location when it is more than 10ft away and out of line of sight from the meter panel. 85% · utility DG manual
• Where must the labels be placed? Main service disconnect (or its outer cover); every 10ft along DC conduit/raceways/cable assemblies and at all DC combiner/junction boxes; at each PV disconnecting means; at the point of interconnection; on/within 3ft of the rapid-shutdown switch; on the meter panel (PG&E signage) and, if the AC disconnect is >10ft from the meter, on a map posted at the meter panel. 88% · published handout + utility manual

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? For most residential inverter-based systems (single-phase, self-contained meter panel, 320A or less) NO ac disconnect switch is required at all under PG&E's current rules. Where one IS required (all other meter-panel types, or non-inverter-based generation), it must be located within 10ft of, and within line of sight of, PG&E's electric meter at the point of interconnection; if installed farther than 10ft away or out of line of sight, signage and a map showing the AC disconnect and meter locations must be posted at the meter panel. 88% · utility DG manual
• Must equipment be on a specific approved list? Yes 93% · published handout
• Are batteries permitted, and under what conditions? Yes, batteries/ESS are permitted, but only through specific permit types: the SolarAPP+ 'WITH ESS' online permit types (systems up to 38.4kW), or standard full plan review. The two basic manual online permit types ('ONL SOL' and 'ONL SOL WITH PANEL') explicitly exclude ESS installation. 85% · published handout
• Is there a separate ESS permit or inspection? No - ESS is bundled into the same PV permit type/application rather than issued as a separate permit (e.g. 'ONL SOL APP UP TO 15kW WITH ESS'). 78% · published handout
• Is there a local rule on service upgrades or busbar sizing? Ordinance 65.155 amends CEC 230.2 to require all NEW electrical services to be underground (exception: relocation/replacement of an existing service), and amends CEC 230.70(A) to require the main service disconnect be on the first floor. No local override of the standard CEC 705.12(B) 120% busbar rule for PV interconnection was found. 75% · adopting ordinance
• Is a specific mounting system or attachment spacing required? No city-specific mounting/spacing spec beyond code: modules must be attached per the manufacturer's instructions and mounting systems listed/labeled to UL 2703. 62% · published handout

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 88% · department page
• How much notice is required? For solar specifically: inspection to be scheduled within two (2) business days of request (per the streamlined-solar ordinance's own service commitment). Cancelling any inspection requires 24-hour notice. 78% · adopting ordinance
• Are same-day or AM/PM windows offered? Yes for solar under the streamlined ordinance: a 2-hour inspection window is guaranteed. General building inspection windows are not separately confirmed. 75% · adopting ordinance

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 93% · published handout
• If delegated, to whom? N/A - not delegated. City of Milpitas Building Safety inspectors perform the electrical/structural/PV inspection; the City's own Fire Prevention Bureau inspects for fire/life-safety conditions. 88% · 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? Typically up to two inspections: Rough (if any work is inside walls/ceilings before covering) and Final (after all work complete). Smoke/CO alarm and spark-arrester compliance is verified at or before final, either at the final inspection or via a compliance certificate. 90% · published handout
• Is a rough-in or mid-roof inspection required? Yes, if applicable - a rough inspection is required whenever any work is inside walls or ceilings prior to being covered with finish materials; not required for exterior-only roof-mount work with no interior wiring exposed. 85% · published handout

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 95% · published checklist
• What must be on site at inspection? Approved permit card/set of plans (or SolarAPP+ approval document, if used); manufacturer cut-sheets/installation instructions; proof of Workers' Compensation insurance if the owner hired workers; an OSHA-approved ladder (minimum Type I, 250 lb rating) for roof access. 82% · published handout
• Does the inspector verify labels and listings? Yes 90% · published checklist

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 78% · published handout
• Who notifies the utility for PTO? Installer 72% · utility DG manual
• Is there a re-inspection fee? $365 flat (Reinspection Investigation Fee, per reinspection). 70% · fee schedule
• How are corrections issued and cleared? Corrections are noted by the inspector at the time of inspection; a discrepancy list is available to the applicant through the online permit portal (permit search -> inspection tab -> more information link) rather than through the phone/IVR system. 78% · department page