California / Local permit guide
Fairfield Solar Permit Guide
Your local requirements. The official sources. A clearer next step.
- Permit authority
- City of Fairfield Building Safety DivisionSource linked
- Electric utility
- Pacific Gas & Electric (PG&E)Source linked
- Local pathway
- SolarAPP+ (residential roof-mounted, retrofit systems) via eTRAKiTProject-specific eligibility conditions apply.
- Review time
- 0–1 daysSee source scope and conditions below.
Solano County · Explore related utility guides
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Your permit path,
at a glance.
This shows what GridPermit has verified for Fairfield. 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.
Permit timeline
0–1 days
The City's own page states 'A permit application that previously took days or weeks for review can now be approved instantly and issued the next business day,' and separately that eligible projects use 'the automated SolarAPP+ portal for instant permitting.'
Sources & confidence
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
Not yet verified.
Rebates on record
Rebates on record
Not yet verified.
Utility and generation supplier
Utility
Pacific Gas & Electric (PG&E)
Fairfield is a well-documented Solano 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 Fairfield as one of 4 Solano County communities it serves (alongside Benicia, Vallejo, and unincorporated Solano 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
- Log in to BUILD and proceed through the SolarAPP+ permit application process
- Upload all documents received from SolarAPP+, as well as plans, to BUILD after applying
- Email building@fairfield.ca.gov with the permit number to confirm the SolarApp+ documents have been uploaded
- Schedule the inspection in BUILD
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: SolarAPP+ (residential roof-mounted, retrofit systems) via eTRAKiT
- Other conditions:
- Commercial, multi-family, ground-mount, or addition-to-existing-system projects must be submitted directly to Building Safety by email
- Applicants must submit for and receive building permit approval prior to installation
Sources & confidence
Official contacts
Official contacts
- City of Fairfield Building Safety Division, phone: 707-428-7451, email: building@fairfield.ca.gov, official website
Need a solar installer who handles permits in Fairfield?
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
- SolarAPP+ for Solar Installers, City of Fairfield (government). Accessed 2026-08-09.
- Net Energy Metering (NEM), Pacific Gas & Electric (utility). Accessed 2026-08-08.
- Service Area, MCE (Marin Clean Energy) (other_official). Accessed 2026-08-08.
- About, Self-Generation Incentive Program (SGIP) (cpuc). Accessed 2026-08-09.
- 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 Fairfield, California?
Pacific Gas & Electric (PG&E) is the interconnection and distribution utility for Fairfield. The default electricity generation supplier is MCE (Marin Clean Energy), a Community Choice Aggregator (CCA), separate from Pacific Gas & Electric (PG&E).
How long does a residential solar permit take in Fairfield?
The City's own page states 'A permit application that previously took days or weeks for review can now be approved instantly and issued the next business day,' and separately that eligible projects use 'the automated SolarAPP+ portal for instant permitting.'
What documents are required for a solar permit in Fairfield?
Commonly required documents include: Active City of Fairfield business license; SolarAPP+ approval documents; Plans (uploaded to BUILD along with SolarAPP+ documents); Master solar permit number (subdivision roof-mount projects only).
Who do I contact about solar permits in Fairfield?
City of Fairfield Building Safety Division, phone 707-428-7451, email building@fairfield.ca.gov.
Related cities
Related cities
Other verified cities related to Fairfield. See all cities on the California solar permit guide index.