City of Monte Sereno

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 handout
• What does this authority permit itself, and what does it delegate? Both 88% · department handout
• Is a permit required for a residential rooftop PV system? Yes 98% · department handout
• Is there a separate electrical permit, or is it combined? Combined 78% · department form
• Is a HOA or architectural approval required first? No, for a qualifying small residential rooftop solar system. 78% · municipal code
• Is there a historic-district review? No, for a qualifying small residential rooftop solar system on a property not on the City's historical inventory. 62% · municipal code
• Is a Specific Use Permit or Council approval ever required? No -- the Building Official's issuance of a small residential rooftop solar permit is expressly 'nondiscretionary'; a Council/Use Permit process is not invoked unless the Building Official makes a written, evidence-based finding of a 'specific, adverse impact' on public health/safety, in which case the applicant may be required to apply for a minor residential permit, appealable to the Planning Commission (not Council). 82% · municipal code
• Is there a system-size cap on residential generation? 10 kW AC nameplate (or 30 kW thermal) on a single- or duplex-family dwelling, not exceeding the maximum legal building height, is the ceiling for the 'small residential rooftop solar energy system' definition eligible for the City's expedited/administrative permitting path (unchanged AB 2188-era figure). 92% · 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 85% · department form
• Is a homeowner permitted to self-install and self-permit? Yes 85% · department 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? Per the City's own PV handout Permit Process section: a completed Building Permit Application; site plan showing the building and PV panel locations with roof pathways dimensioned; electrical plans including a single-line diagram and load calculations (if the main breaker is under 200A); equipment brochure with installation requirements and UL listing; roof framing plan (rafter size, spacing, span, slope); attachment details for panels to the roof structure; and the weight of the panels to be installed. For ESS, add: site plan showing ESS battery location(s); floor plan showing ESS and smoke/CO/heat alarm locations; equipment brochure/UL listing; and an electrical single-line diagram showing the connection to the PV system and main panel. 95% · department handout
• How many copies, and in what format? Electronic only, submitted through the ePermits portal (epermits.montesereno.org); the PV and ESS handouts give no physical-copy count, unlike some of the City's other minor-permit handouts (e.g. the Electrical Panel Replacement and EV Charger handouts, which specify '3 copies of each item' for over-the-counter submittal at City Hall). 68% · department page
• Is a site plan required, and what must it show? Yes -- must show the location of the building and the location of the PV panels with roof pathways dimensioned. 95% · department handout
• Is a one-line / three-line diagram required? Yes 95% · department handout
• Are string and conductor calculations required? Yes 88% · department handout
• Is a structural PE stamp required, and at what threshold? A stamped/signed structural PE is required unless the system meets the City's prescriptive path: combined module/support weight <=5 psf, standoff clearance 2"-10", panels anchored at max 4' on-center each direction with a minimum 5/16" diameter bolt embedded a minimum 2-1/2" into roof framing, and roof structurally sound with no signs of deflection/sagging. Outside these parameters, plans/calculations/details must be stamped and signed by a California-registered civil/structural engineer and approved by the City. 92% · department 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? ePermits (epermits.montesereno.org) 95% · portal landing page
• Can the whole application be completed online? Yes 88% · municipal code
• What does a residential solar permit cost? $196.19 flat (Building fee schedule line item 'Solar'); a $150 plan-check deposit is collected at submittal and credited toward this fee. 88% · fee schedule
• How is the fee calculated? Flat 85% · fee schedule
• Is there a separate plan-check fee? No 72% · 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? For a qualifying small residential rooftop solar system (<=10kW AC/30kW thermal, single/duplex dwelling): same-day issuance for over-the-counter applications, or within 1-3 business days for electronic applications, upon a complete submittal. (Note: the City's general Building Permit Submittal Requirements handout separately states an ~3-week initial plan-check turnaround for building permits generally -- that figure is not the solar-specific expedited-path turnaround.) 90% · municipal code
• Which utility handles interconnection here? PG&E (Pacific Gas & Electric) 90% · department handout

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 80% · municipal code (adopting ordinance)
• Which building code edition is in force? 2025 California Building Code (and 2025 California Residential Code for one- and two-family dwellings) 96% · municipal code (adopting ordinance)
• Which fire code edition is in force? 2025 California Fire Code, including Appendices B, C, D, and O 92% · municipal code (adopting ordinance)
• Are there local amendments to any of the above? Yes 92% · municipal code
• What is the installation judged against? The 2025 California Building/Residential/Electrical/Fire/Green Building Codes as locally amended (MSMC Ch. 9.01), plus the City's own 'Residential Photovoltaic Systems' and 'Residential Energy Storage Systems' Building Division Requirements handouts, which restate and apply specific CBC 3111/CRC R329 pathway-setback rules and CEC 690/705/706 sections to residential PV/ESS review. 90% · department 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? Per CBC 3111 / CRC R329 (except detached non-habitable buildings or roofs sloped 2:12 or less): at least two 36"-wide pathways from the lowest roof edge to the ridge, on separate roof planes, with at least one pathway on the street/driveway side; every roof plane with a PV array needs its own 36"-wide pathway (on the same plane, an adjacent plane, or straddling both) from lowest edge to ridge, over areas capable of supporting firefighter access and minimally obstructed. Ridge setback: 18" from both sides of a horizontal ridge where the PV system covers <=33% of roof area (or <=66% with fire sprinklers); 36" setback where it covers more than that. 95% · department handout

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, required per CEC 690.12. Controlled conductors outside the array boundary must comply with 690.12(B)(1); inside the array boundary with 690.12(B)(2); controlled conductors must be limited to no more than 30V and 240VA within 10 seconds of rapid-shutdown initiation, measured between any two conductors and between any conductor and ground. 95% · department 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? A full set keyed to specific equipment/locations: DC circuit raceways/enclosures/conduits/combiner-junction boxes (CEC 690.31(G)(3)); within 1' of the service disconnecting means (690.56(C)(1)(a)); at each PV system disconnect, AC or DC (690.13(B)); at each DC PV disconnecting means (690.53); at all interactive-system points of interconnection (690.54); at the rapid-shutdown initiation device (690.56(C)(3)); at distribution equipment adjacent to back-fed breakers under the 'sum of breakers' rule (705.12(B)(2)(3)(c)); at PV disconnecting means where line/load may remain energized in the open position (690.13(B)); at DC disconnecting means where both line and load terminals may remain energized (690.13(B)); at back-fed breakers using the 120% rule (705.12(B)(2)(3)(b)); at electrical equipment with overcurrent devices supplying a busbar/conductor from multiple sources (705.12(B)(3)); and at each service equipment location and system-disconnect location for all interconnectable power-production sources (705.10). 95% · department handout
• Does the authority specify placard wording of its own? No 65% · department handout
• Does it specify letter height, colour or material? All marking and labeling shall be a minimum of 3/8" high white letters on a red background, in a material suitable for the environment where it is located (unless otherwise specified for a given label type). 95% · department handout
• Is a site plan / facility map placard required, and what must it show? A CEC 705.10 facility placard is required at each service equipment location and at the location(s) of the system disconnect(s) for all electric power production sources capable of being interconnected; the City's own document cites the code section but does not add its own additional content requirements for a facility/site map beyond that citation. 75% · department handout
• Where must the labels be placed? Each label/placard is tied to a specific device or junction point (service disconnect proximity, PV/DC disconnects, interconnection points, rapid-shutdown initiation device, back-fed breakers, multi-source busbars, combiner/junction boxes, and service equipment/disconnect locations) -- see q38 for the full list with code citations. 90% · department handout

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.

• Must equipment be on a specific approved list? No dedicated City 'approved equipment list' -- equipment must instead be listed/labeled per code: PV panels/modules per UL 1703 or both UL 61730-1 and UL 61730-2; inverters per UL 1741 (and listed for utility interaction if grid-connected); ESS per UL 1741 or UL 9540; all other equipment listed by a nationally recognized testing laboratory for its intended application. 85% · department handout
• Are batteries permitted, and under what conditions? Permitted, with detailed conditions: allowed locations (detached garages/accessory structures; attached garages meeting CRC R302.6 separation; outdoor exterior walls 3'+ from doors/windows and not below emergency escape openings; enclosed utility/storage closets with 5/8" Type X gypsum; never in sleeping rooms or spaces opening into them); units spaced a minimum 3' apart or per manufacturer; individual unit rating capped at 20 kWh; aggregate rating caps by location ranging 40-600 kWh depending on location and non-combustible-eave/setback conditions (CRC R330.4/R330.5); vehicle-impact bollards or wheel barriers required where subject to vehicle damage (CRC R330.8, with specific bollard/wheel-barrier construction details); and an interconnected heat alarm (System Sensor 5602/5622 in unconditioned spaces) required when installed in a garage. 95% · department handout
• Is there a separate ESS permit or inspection? Yes -- 'Energy Storage System' is listed as its own distinct minor-permit type in the ePermits portal, separate from 'Photovoltaic System.' However, no separate ESS fee line exists in the Master Fee Schedule (only 'Solar' and the general 'Electrical, Plumbing or Mechanical' minimum fee), so it appears to be billed under the standard minimum permit fee rather than a bespoke ESS fee. 80% · department page
• Is there a local rule on service upgrades or busbar sizing? The PV main disconnecting breaker shall be located at the opposite end of the busbar from the main disconnecting circuit breaker. 78% · department handout
• Is a specific mounting system or attachment spacing required? Combined weight of modules/support components <=5 psf; standoff clearance from roof surface to underside of module 2"-10"; panels anchored to roof framing at max 4' on-center each direction with a minimum 5/16" diameter bolt embedded a minimum 2-1/2" into the roof framing (unless engineered otherwise by a CA-registered civil/structural engineer). 92% · department 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 / Phone 90% · department page
• How much notice is required? 2 business days (for the codified small-residential-rooftop-solar expedited path) 85% · municipal code
• Are same-day or AM/PM windows offered? A 2-hour inspection window is provided for the expedited small-residential-rooftop-solar path, rather than a full-day or AM/PM-only window; general building inspections otherwise are only available Mondays and Wednesdays 9am-noon with 'no specific time' assigned. 82% · municipal code

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 80% · 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 the expedited small-residential-rooftop-solar path: a single, consolidated final inspection after all work is complete (no separate rough-in/mid-roof stage). Both the PV and ESS handouts' Permit Process sections likewise each describe only 'One final inspection ... required after all the work has been completed.' 88% · department handout
• Is a rough-in or mid-roof inspection required? No 82% · department 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 85% · department handout
• What must be on site at inspection? For PV: an extension ladder extending a minimum of 3' above the roof eave, safely tied off, provided for the inspector; and a completed Smoke Alarm and Carbon Monoxide Alarm Certification Form given to the building inspector. For ESS: the same Smoke Alarm/CO Certification Form. 92% · department handout
• Does the inspector verify labels and listings? Likely yes, but not stated as an explicit inspection-day checklist item. 55% · department handout

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 inspection / permit sign-off) 65% · department handout
• Is there a re-inspection fee? $130.86 per inspection (general Building Division 'Excess Inspection/Excess Re-inspection/Missed Inspection Fee'), applicable beginning with the second re-inspection -- the base permit fee already covers up to three plan reviews and the first re-inspection. No PV-specific re-inspection fee line exists. 75% · fee schedule
• How are corrections issued and cleared? If an application is deemed incomplete, a written correction notice detailing all deficiencies and any additional information/documentation required for expedited eligibility is sent to the applicant for resubmission. 82% · municipal code