City of Mountain House

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 88% · ordinance
• What does this authority permit itself, and what does it delegate? Both 85% · fee schedule + ordinance
• Is a permit required for a residential rooftop PV system? Yes 92% · official checklist + ordinance
• Is there a separate electrical permit, or is it combined? Combined 70% · fee schedule (inference)
• Is a HOA or architectural approval required first? Not addressed by City ordinance — MHMC 8-2-100 to 8-2-102 (the small-residential-rooftop-solar chapter) contains no clause forbidding conditioning approval on HOA/architectural review (unlike some peer CA cities, e.g. San Marcos SMMC 17.04.020.5.f, which states this explicitly). The chapter does incorporate Civil Code §714(c)(iii) by reference in its 'small residential rooftop solar energy system' definition, and §714 independently limits HOA authority to unreasonably restrict solar installations as a matter of state law regardless of local silence. 50% · ordinance (proven absence) + state law
• Is there a historic-district review? No 70% · ordinance table of contents (proven absence)
• Is a wind or windstorm certification required? No 55% · ordinance (absence) + general CA practice
• Is a Specific Use Permit or Council approval ever required? Not addressed in the small-residential-rooftop-solar chapter — MHMC 8-2-100 to 8-2-102 contains no 'specific, adverse impact' / discretionary-use-permit override clause of the kind some peer CA cities adopted (contrast San Marcos SMMC 17.04.020 §§5.a-5.e). A Council/Use Permit could in principle still be triggered for a system falling OUTSIDE the 10kW AC/30kW-thermal 'small residential rooftop' definition, but this is not stated anywhere found. 50% · ordinance (proven absence)
• Is there a system-size cap on residential generation? 10 kW AC (CEC nameplate rating) or 30 kW thermal, and installed on a single or duplex-family dwelling, to qualify as a 'small residential rooftop solar energy system' eligible for the streamlined process; larger systems are not barred but fall outside this expedited pathway and its guarantees (one inspection, 2-business-day inspection scheduling) 88% · ordinance

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 55% · official policy form + inference from ordinance silence
• Is a homeowner permitted to self-install and self-permit? Yes 60% · official form + inference

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? A building/electrical permit application plus a plan set (site plan, structural/electrical plans and Title 24 energy calculations if required) submitted through the GreenVue portal, per the City's general 'Residential Plan Submittal Requirements.' MHMC 8-2-101(a) separately REQUIRES the Building Division to develop and publish a solar-specific eligibility checklist for the expedited process, but no such checklist appears among the ~20 documents linked from the Building Division page (only a 2024 'Solar PV Re-Roofing Policy' exists, which covers re-roofing over an EXISTING system, not a general new-install checklist) — i.e., the ordinance's own publication mandate appears unmet. 60% · official handout + ordinance (unmet publication mandate)
• How many copies, and in what format? Electronic submittal via the GreenVue portal, 'not protected/locked' (i.e., unlocked/editable PDF files); no physical copy count is specified 78% · official handout
• Is a site plan required, and what must it show? Yes, a general Site Plan is required (showing setbacks and dimensions for additions); no solar-specific site-plan content requirement (panel layout, pathway widths, disconnect locations) is separately published because the ordinance-mandated solar eligibility checklist (MHMC 8-2-101(a)) has not been published — see Q8 55% · official handout (partial)
• Is a structural PE stamp required, and at what threshold? No solar-specific threshold is published. Generally, 'Residential Plan Submittal Requirements' requires 'Sets of Structural Calculations... if required for your project' and states 'All Engineering sheets must be stamped and signed by a California Licensed Engineer' — but gives no numeric threshold (roof load, system weight, etc.) and does not address whether a small rooftop PV retrofit ever triggers this. 50% · official handout (general, not solar-specific)

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? GreenVue Permit Portal (a CSG Consultants product) at greenvue.csgengr.com/mountainhouse/public/PermitLogin.aspx, linked from the Building Division page and named directly in the 'Residential Plan Submittal Requirements' handout 88% · official handout + department page
• Can the whole application be completed online? Yes 80% · ordinance + official handout
• What does a residential solar permit cost? $230 flat for residential systems ≤15kW AC, plus $15.00 per kW above 15.1kW, PLUS a separate plan-check fee (amount not itemized for this specific line; the schedule's general minimum plan-review fee elsewhere is $150.00). Commercial: $606 up to 50kW, plus $7/kW (50.1-250kW) or $5/kW (above 250.1kW), plus plan check. 82% · official fee schedule (self-extracted PDF)
• How is the fee calculated? Tiered 88% · official fee schedule
• Is there a separate plan-check fee? Yes 80% · official 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.

• How long is an issued permit valid before it expires? 12 months to commence work after issuance; work is considered suspended/abandoned (and the permit becomes invalid) if 180 days pass without a recorded, approved inspection 92% · ordinance
• Which utility handles interconnection here? Modesto Irrigation District (MID) — electric; Pacific Gas & Electric (PG&E) — gas only 90% · department page (utility identity)
• Where does the utility sit in the sequence? After permit — MID's own Solar PV Interconnection Handbook describes the sequence as: MID gives engineering/contingent approval, the contractor installs and obtains the City building permit sign-off, the SIGNED-OFF permit is then submitted to MID, MID performs its own interconnection inspection, and only then installs the generation meter and issues Permission to Operate. Permits must be signed off within 6 months of requesting MID's inspection. 85% · utility 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? 2020 (as codified) — but this is genuinely unsettled for the current cycle; see why 55% · adopting ordinance (as codified; cycle-update ambiguous)
• Which building code edition is in force? 2022 California Building Code, incorporating the 2021 IBC (as codified) — same cycle-update caveat as Q29 applies: the 2025 CBC took effect statewide 1 Jan 2026 and the City's own special-inspections form (dated 7-14-26) already refers to the '2025 CBC,' but Title 8's codified adoption section had not been amended to match as of the last Municode supplement checked (Supp. 2, Sept 2025). 55% · adopting ordinance (as codified; cycle-update ambiguous)
• Which fire code edition is in force? 2022 California Fire Code, incorporating the 2021 IFC (as codified) — same cycle-update caveat as Q29/30 55% · adopting ordinance (as codified; cycle-update ambiguous)
• Are there local amendments to any of the above? Yes 90% · ordinance
• What is the installation judged against? The 2022 California Building/Residential/Electrical/Mechanical/Plumbing/Green Building Standards Codes as locally amended by MHMC Title 8 (subject to the 2025-cycle ambiguity noted at Q29/30), plus the small-residential-rooftop-solar streamlined chapter (MHMC 8-2-100 to 8-2-102) and MID's own Rule 21 / Solar PV Electric Service Guide for interconnection-side requirements 65% · 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 locally amended for PV specifically — clear access pathways would be governed by the unamended 2022 CFC §605.11 provisions (no local search hit for 'pathway,' 'setback,' or '605' in the fire chapter's PV/solar context); MHMC 8-2-102 only says a 'separate fire safety inspection' MAY be required for a streamlined-eligible system, without detailing the standard. 55% · ordinance (proven absence)

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, per NEC 690.12 as incorporated by the currently codified 2020 NEC edition (via the 2022 CEC) — no local amendment to Article 690 was found; see the Q29 caveat on which NEC edition is actually current administrative practice as of 2026. 65% · adopting ordinance (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.

• Which placards does this authority require at the service equipment? Utility-mandated placards (no separate City-specified placard set found): (1) Caution PV and Utility Power Placard, (2) Solar Array AC Disconnect Placard, (3) Utility Use Only AC Disconnect Placard, (4) Solar Production Placard, (5) Solar Breaker Placard — all specified by MID (the electric utility), not the City. 78% · utility spec (self-extracted PDF)
• Does the authority specify placard wording of its own? The City does not specify its own placard wording (no hits for 'placard' anywhere in Title 8, fetched complete); MID (the utility) DOES specify placard wording/design via numbered sample figures in its own Service Guide. 75% · utility spec (proven City-side absence)
• Does it specify letter height, colour or material? Minimum 1/4-inch letters, impressed into or raised from a tag of plastic laminate, aluminum, brass, or other non-ferrous metal; deep/raised enough to survive repainting; attached with high-strength 5-minute epoxy (rivets/screws not acceptable) so it cannot be removed without hand tools 85% · utility spec (self-extracted PDF)
• Does the UTILITY specify placards beyond the AHJ's? Yes — MID (the electric utility, not PG&E for this address) requires two visible, lockable, full-load-rated AC disconnects plus the placard set described at Q38/40, none of which is duplicated in City ordinance 85% · utility spec
• Where must the labels be placed? The two AC disconnects, generation meter, and required placards must all be within approximately 12 feet and within line of sight of the Main Service Panel (MSP), on the SAME side of any gate/fence as the MSP; if an exception is granted for separation, an additional placard is required at the MSP itself reading (in substance) that required MID solar equipment is on the opposite side of the adjacent gate 85% · utility spec (self-extracted PDF)

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? The AC disconnect adjacent to the main electric panel, and the production meter socket, must be installed within 12 feet of, and within line of sight of, the main electric panel, in a readily accessible location on the SAME side of any gate/fence as the panel 88% · utility spec (self-extracted PDF)
• Must equipment be on a specific approved list? Yes 75% · utility spec
• Are batteries permitted, and under what conditions? Batteries/ESS are permitted but are NOT addressed anywhere in City ordinance (Title 8, fetched complete, has zero hits for 'battery' or 'energy storage'); MID (the utility) governs them instead — its Service Guide requires a 'Smart Contactor' to auto-disconnect an ESS on abnormal voltage/frequency, and states ESS 'shall not be configured to export power back onto MID's system,' i.e. backup/peak-shaving use only. 70% · utility spec + ordinance (proven City-side absence)
• Is a ground mount treated as a structure? Not directly addressed — likely Yes by default. The streamlined small-residential-rooftop-solar chapter (MHMC 8-2-100(d)(3)) is scoped explicitly to systems 'installed on a single or duplex family dwelling' (i.e., rooftop), so a ground-mount array falls outside that chapter and would default to standard CBC treatment as an accessory structure/foundation under Title 8 Division 1 and Title 9 zoning, which is the general rule in California absent a specific exemption. 50% · ordinance (inference from scope + proven absence)

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 or Email 82% · department page
• How much notice is required? 1 business day (request by 4:00 p.m. the day before) 82% · 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 78% · ordinance
• If delegated, to whom? Not legally delegated to another agency — but the Building Official and inspection function are staffed under contract by CSG Consultants. The City's own staff directory lists Mike Brinkman as 'Building Official,' and the identical name/title appears in the City of Patterson's staff directory on an @csgengr.com (CSG Consultants) email address, which is the cross-reference proving the staffing arrangement (Mountain House's own listing gives only the generic mhbuilding@sjgov.org department mailbox, which does not itself disclose the contractor). 65% · staff directory cross-reference (inference)

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 a streamlined-eligible small residential rooftop system: a single consolidated final inspection, unless the installation is found out of compliance or a separate fire-safety inspection is required. For systems outside that definition (e.g., larger or non-rooftop systems), no separate documented sequence was found — general building-permit practice (per MHMC 8-1-108) would presumably apply but is not spelled out for solar specifically. 72% · ordinance
• Is a rough-in or mid-roof inspection required? No (for streamlined-eligible systems) 75% · ordinance

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? No — a published inspection/eligibility checklist does not appear to exist despite the ordinance requiring one 68% · ordinance + department page (proven gap)
• Does the inspector verify labels and listings? Likely yes, but not stated explicitly 55% · ordinance (inference)

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 — for one- and two-family dwellings and their accessory structures, an approved final inspection on the building permit itself IS the certificate of occupancy; no separate CO document is issued 88% · ordinance
• Who notifies the utility for PTO? Installer — MID's own Solar PV Interconnection Handbook describes the contractor submitting the signed-off building permit directly to MID to trigger MID's interconnection inspection and Permission to Operate; the AHJ does not push this notification itself 78% · utility page
• Is there a re-inspection fee? $150.00 per re-inspection, chargeable after two consecutive failed inspections of the same item 90% · official fee schedule
• How are corrections issued and cleared? For the streamlined solar pathway, MHMC 8-2-101(d)-(e) only says the Department shall 'promptly approve or deny the application in writing' — it does not describe a formal correction-notice/resubmission process the way the City's own EV-charging chapter does (MHMC 8-3-103(b)(1)(iii): 'written correction notice... detailing all deficiencies'). For general residential plans, the 'Residential Plan Submittal Requirements' handout describes a resubmittal process requiring 'the plan review correction list with responses.' 60% · ordinance + official handout (inference)