What does getPermit actually do?

getPermit reads your job details and tells you what a California city expects before you file: which permits the work triggers, the documents and plans you'll need, the fees to budget for, and the common reasons applications in that jurisdiction get bounced back. It produces a clear checklist you can act on. It does not submit to the city for you — you (or your permit person) stay in control of what gets filed.

Is there a human involved, or is it just AI?

Both. The AI does the research and drafts the assessment and checklist; an experienced permit coordinator reviews and approves it before it's treated as authoritative. The human check is the point — it's how we keep it trustworthy in a process where a wrong filing has real consequences.

Which cities do you cover?

We're starting deep in California rather than shallow everywhere. For a city we haven't fully mapped yet, we'll give you accurate general California guidance and point you to that city's official building department — and you can join the waitlist to be notified when we cover it in depth. We will not invent city-specific fees or timelines we haven't verified.

Solo electricians, plumbers, and HVAC contractors, and small general contractors who don't have a dedicated permit department and lose billable hours to permit admin.

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It's pre-launch. Join the waitlist and you'll get founder pricing, your jurisdiction prioritized, and a direct line to the team. No spam, no credit card.

We're onboarding a first set of California contractors. Join the waitlist with your city and trade so we can prioritize the jurisdictions our early users actually work in.

Solar interconnection permits in Walnut Creek, CA

General California guidance last updated May 22, 2026 · Walnut Creek data verified August 9, 2026

What electrical contractors need to know about pulling a solar interconnection permit in Walnut Creek (Contra Costa County).

Short answer

In California, installing a grid-tied solar PV system needs an electrical permit (often called a PV or solar-interconnection permit), pulled by a licensed C-10 or C-46 contractor. The work follows the California Electrical Code (Title 24, Part 3, Article 690) and California's expedited residential solar permitting (most cities use SolarAPP+). Battery-storage interconnection (Article 706) adds further scope.

Walnut Creek accepts submittal through the Online Permit Portal (Accela Citizen Access) and has adopted the 2025 California Building Standards Code. Fee details and sources are below.

Walnut Creek permit data

Sourced from public City of Walnut Creek documents — every field carries the source URL and verification date.

Permit portal

Online Permit Portal (Accela Citizen Access)

verified Aug 9, 2026 · source · All building permit types are applied for through the portal; the city links the Accela-hosted URL directly (no stable city shortlink), and a registered portal account is required to apply

Adopted code edition

2025 California Building Standards Code

verified Aug 9, 2026 · source · The 2025 codes were published July 1, 2025 and became applicable to all building permit applications made on or after January 1, 2026

Fee schedule

City of Walnut Creek Master Fee Schedule FY 2026 & FY 2027 — Community Development / Building Division fees

verified Aug 9, 2026 · source · The schedule is stated by fiscal years (FY2026 & FY2027) with no calendar effective date; a 3% service fee applies to all credit/card payments

City of Walnut Creek Community Development — Building Division →All verified Walnut Creek data →

The general picture in California

A solar PV interconnection ties the new array into the building's electrical system at the main panel, a backfed breaker, or a load-side/line-side tap. The permit covers module count and wattage, string and inverter configuration, the AC and DC disconnects, the interconnection point, grounding, rapid shutdown (NEC 690.12), and labeling. California requires expedited residential solar permitting — most cities use SolarAPP+ for instant or same-day issuance on code-compliant designs. The utility interconnection application (PG&E, SCE, LADWP, SDG&E) runs in parallel with the city permit and is the contractor's responsibility.

For deeper background that isn't Walnut Creek-specific, see the statewide solar interconnection guide.

Typically needs a permit

Solar interconnection itself triggers a permit in nearly every California jurisdiction, Walnut Creek included. Walnut Creek-specific variations are confirmed with the issuing department above.

Usually doesn't (general norm)

Cleaning or replacing damaged modules with identical units on an already-permitted system (verify locally)
Resetting inverters or rapid-shutdown devices
Replacing monitoring or communications equipment that doesn't affect the electrical system

Documents & plans generally required

Electrical permit application — many California cities use SolarAPP+
Contractor license and city business registration
Site/plot plan showing the array, conduit run, and interconnection point
Single-line diagram with module / inverter / disconnect / breaker / OCPD ratings
Module and inverter cut sheets (listed equipment)
Structural attachment detail for roof-mounted systems (often deferred-submittal to engineer)
Load calc + 120% rule check at the interconnection (NEC 705.12) — or supply-side tap detail
Rapid-shutdown initiation and labeling per NEC 690.12 and the local code cycle
Utility interconnection application (handled in parallel with the city permit)

Common reasons solar interconnection applications get bounced

Code-rooted patterns across California — not a Walnut Creek-specific rejection rate.

120% rule violation at the main panel without a supply-side tap or main-breaker derate
Single-line diagram missing or inconsistent with the cut sheets
Rapid-shutdown initiation and labeling not shown per NEC 690.12
Conductor / OCPD sizing not at 125% of the inverter's max output current
Structural attachment / roof-load calc missing for roof-mounted systems
No grounding/bonding detail for the array and module frames (EGC + WEEB or listed clip)
Battery storage proposed without Article 706 scope (separate disconnect, signage, listing)

The inspection sequence

A typical order — the number of stops and exact sequence vary by jurisdiction and scope.

1Rough inspection if any conduit or wiring is concealed before cover
2Final inspection with the system installed, labeled, energized into a test load, and rapid-shutdown verified
3Utility permission-to-operate (PTO) granted separately by the utility after city sign-off

Licensing — who can pull it

Solar PV installations in California are performed by a C-10 (Electrical) or C-46 (Solar) licensed contractor; a B (General Building) contractor may pull within a larger project under CSLB rules. C-46 is solar-specific; C-10 covers solar as electrical work. The licensed contractor pulling the permit typically also files the utility interconnection.

Other verified Walnut Creek notes

Development Services Counter: City Hall, 2nd Floor — open Monday–Thursday 8:30 AM–12 PM and 1–4 PM for appointments or walk-ins; staff assist with the permit process.
verified Aug 9, 2026 · source
Building staff: (925) 943-5834 · BuildingTech@walnutcreekca.gov · City Hall, 1666 North Main Street, Walnut Creek, CA 94596. Fridays: remote services only.
verified Aug 9, 2026 · source
Permit issuance requires the signature of the legal property owner or a California licensed contractor; an agent for either party may sign with written authorization submitted with the application.
verified Aug 9, 2026 · source
Inspections are requested online through a registered Accela account linked to the project — schedule by midnight for next-day service.
verified Aug 9, 2026 · source
Commercial Express Review: qualifying commercial tenant-improvement projects can be approved in a single 90-minute virtual meeting — Tuesdays, by appointment, with a 50% plan-review fee surcharge.
verified Aug 9, 2026 · source

Frequently asked questions

How does SolarAPP+ change the permit process in California?

SolarAPP+ is a state-encouraged automated plan-review tool many California cities have adopted for residential solar (and increasingly storage) under the state's expedited-permitting laws. For code-compliant designs, it issues a permit instantly or same-day. Cities not using SolarAPP+ still must process residential solar permits on expedited timelines.

Do I need a separate permit for battery storage?

Battery storage adds NEC Article 706 scope — additional disconnect, signage, listing requirements, and often a separate or combined permit. Many cities bundle PV+ESS into a single permit; others issue them separately. Storage retrofits to existing PV are a permit on their own.

What is the 120% rule?

NEC 705.12 limits how much PV current can be backfed through the main-panel busbar: the main breaker + PV breaker cannot exceed 120% of the busbar rating. When that fails, options are derating the main breaker, a line-side (supply-side) tap, or upgrading the panel. This is the single most common solar-permit gotcha.

Who handles the utility interconnection?

The contractor typically files the utility's interconnection application (PG&E, SCE, LADWP, SDG&E, etc.) in parallel with the city permit. City sign-off is required for the utility to grant permission-to-operate (PTO) — the system shouldn't be energized to the grid until PTO is issued.

Other jobs in Walnut Creek

AC changeout Battery storage EV charger install All Walnut Creek permits All California jobs

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