California / Local permit guide
Napa Solar Permit Guide
Your local requirements. The official sources. A clearer next step.
- Permit authority
- City of Napa Building DivisionSource linked
- Electric utility
- Pacific Gas & Electric (PG&E)Source linked
- Local pathway
- Over-the-counter residential Solar & Battery Backup permittingProject-specific eligibility conditions apply.
- Review time
- Not yet verified.
Napa County · Explore related utility guides
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Your permit path,
at a glance.
This shows what GridPermit has verified for Napa. It does not show the status of a specific project.
01 / Know your path
Two approvals.
One project.
A local permit and utility permission to operate are different approvals. Check the local sequence and requirements below.
How to read this guide
GridPermit collects California residential solar and permitting facts directly from official sources (city, county, and state government sites, utilities, and public utilities commissions) and shows only what we can verify, with a confidence score and a link to where it came from. Nothing here is estimated or inferred beyond what's stated below. See our methodology for the rules this page follows.
Battery/solar incentive program on record
California SGIP - current category and budget check required
New applications and waitlist applications for ratepayer-funded SGIP budgets closed on December 30, 2025. New AB 209 applications have a June 30, 2028 deadline. The 2026 SGIP rate table publishes $3.10/W for solar and $1.10/Wh for storage in applicable Residential Solar and Storage Equity categories. Household eligibility and live budget availability vary by category and program administrator; check the official Program Metrics tracker before relying on an incentive.
Status on file: unknown. Verify current status before relying on this.
Sources & confidence
02 / Prepare your application
What you need.
Sources & confidence
Permit fees
The page references a Master Fee Schedule available online but does not itself state solar-specific permit costs.
Not yet verified.
Rebates on record
Rebates on record
Not yet verified.
Utility and generation supplier
Utility
Pacific Gas & Electric (PG&E)
The City of Napa is a well-documented Napa County city within PG&E's core Northern California service territory.
Sources & confidence
Generation supplier
MCE (Marin Clean Energy) (Community Choice Aggregator)
MCE's own service-area page confirms Napa as one of 6 Napa County communities it serves (alongside American Canyon, Calistoga, St. Helena, Yountville, and unincorporated Napa County). PG&E continues to deliver the power and provide billing/customer service.
Sources & confidence
Interconnection
https://www.pge.com/en/save-energy-and-money/rebates-and-incentives/nem.html
PG&E's own utility-wide Net Energy Metering (NEM) program page.
Inspection steps
- Call the automated inspection line at 707-257-1063
Sources & confidence
Eligibility constraints
- Property types: residential
- Max system size (AC): Not yet verified.
- Max system size (DC): Not yet verified.
- Max thermal capacity: Not yet verified.
- Program/pathway: Over-the-counter residential Solar & Battery Backup permitting
- Other conditions:
- Processed over-the-counter during walk-in hours, Monday-Thursday 8:30am-3:30pm
- Project must be located within city limits
- The city does not have an online portal for submittals
Sources & confidence
Official contacts
Official contacts
- City of Napa Building Division, Plans Examiner, phone: 707-257-9540, email: buildingdivision@cityofnapa.org, official website
Need a solar installer who handles permits in Napa?
EnergySage is an independent solar marketplace where you can request property-specific pricing from installers familiar with local permitting.
Compare quotes from solar installers →You'll continue on EnergySage's website. GridPermit links to EnergySage as an independent third-party resource. This link is not currently tracked for compensation.
Official sources
Official sources
- Solar PV, City of Napa (government). Accessed 2026-08-08.
- Net Energy Metering (NEM), Pacific Gas & Electric (utility). Accessed 2026-08-08.
- Service Area, MCE (Marin Clean Energy) (other_official). Accessed 2026-08-08.
- Self-Generation Incentive Program (SGIP), California Public Utilities Commission (cpuc). Accessed 2026-10-08.
- 2026 Self-Generation Incentive Program Handbook, Self-Generation Incentive Program Program Administrators (program_administrator). Accessed 2026-08-26.
- SGIP Program Metrics and Incentive Step Tracker, Self-Generation Incentive Program Program Administrators (program_administrator). Accessed 2026-08-26.
Frequently Asked Questions
What utility serves solar customers in Napa, California?
Pacific Gas & Electric (PG&E) is the interconnection and distribution utility for Napa. The default electricity generation supplier is MCE (Marin Clean Energy), a Community Choice Aggregator (CCA), separate from Pacific Gas & Electric (PG&E).
What documents are required for a solar permit in Napa?
Commonly required documents include: Building permit application (one per project); Two full sets of plans (title page, site plan, structural calculations, single-line electrical, attachment details); Footing details (ground-mounted systems); Equipment cut sheets; Signed homeowner contract; Active City of Napa Business License (contractor).
Who do I contact about solar permits in Napa?
City of Napa Building Division, Plans Examiner, phone 707-257-9540, email buildingdivision@cityofnapa.org.
Related cities
Related cities
Other verified cities related to Napa. See all cities on the California solar permit guide index.
- American Canyon, Pacific Gas & Electric (PG&E)
- St. Helena, Pacific Gas & Electric (PG&E)
- Yountville, Pacific Gas & Electric (PG&E)
- Albany, Pacific Gas & Electric (PG&E)
- Antioch, Pacific Gas & Electric (PG&E)
- Arroyo Grande, Pacific Gas & Electric (PG&E)