Portola Valley Solar Permit Guide
Pacific Gas & Electric (PG&E) territory · San Mateo County
Overview
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
0–3 days
The building department shall issue a building permit or other nondiscretionary permit within three business days of receipt of a complete application, including review by Woodside Fire Protection District, if the application meets the approved checklist and standard plan.
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.
Permit fees
Not yet verified.
Rebates
Not yet verified.
Utility and generation supplier
Utility
Pacific Gas & Electric (PG&E)
Generation supplier
WestLight Energy (formerly Peninsula Clean Energy) (Community Choice Aggregator)
WestLight Energy's own site confirms it is San Mateo County's CCA, formed in 2015 after every city council in the county voted to establish it, serving the entire county (all cities/towns, including Portola Valley) since 2017. PG&E continues to deliver the power and provide billing/customer service.
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.
Required documents
- Building Permit application (required when: always)
- Wet-signed and stamped building plan sets (required when: always)
- Structural calculations (required when: always)
- Title 24 calculations (required when: always)
Inspection steps
Not yet verified.
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: Expedited, streamlined solar permitting (Solar Rights Act / AB 2188 compliant)
- Other conditions:
- Detached ADUs must provide conduit pathway infrastructure to support future solar installation (Solar Photovoltaic 'Ready' Infrastructure requirement)
- Applications reviewed in coordination with Woodside Fire Protection District
Official contacts
- Town of Portola Valley Planning & Building Department, phone: 650-851-1700, email: planbuild@portolavalley.net, official website
Need a solar installer who handles permits in Portola Valley?
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 has a partner relationship with EnergySage; this link is not currently tracked, and whether the partnership results in compensation to GridPermit has not yet been confirmed.
Sources
- Building Permit FAQs, Town of Portola Valley (government). Accessed 2026-08-10.
- Net Energy Metering (NEM), Pacific Gas & Electric (utility). Accessed 2026-08-08.
- In the Community, WestLight Energy (formerly Peninsula 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 Portola Valley, California?
Pacific Gas & Electric (PG&E) is the interconnection and distribution utility for Portola Valley. The default electricity generation supplier is WestLight Energy (formerly Peninsula Clean Energy), a Community Choice Aggregator (CCA), separate from Pacific Gas & Electric (PG&E).
How long does a residential solar permit take in Portola Valley?
The building department shall issue a building permit or other nondiscretionary permit within three business days of receipt of a complete application, including review by Woodside Fire Protection District, if the application meets the approved checklist and standard plan.
What documents are required for a solar permit in Portola Valley?
Commonly required documents include: Building Permit application; Wet-signed and stamped building plan sets; Structural calculations; Title 24 calculations.
Who do I contact about solar permits in Portola Valley?
Town of Portola Valley Planning & Building Department, phone 650-851-1700, email planbuild@portolavalley.net.
Related California cities
Other verified cities related to Portola Valley. See all cities on the California solar permit guide index.
- Atherton, Pacific Gas & Electric (PG&E)
- Belmont, Pacific Gas & Electric (PG&E)
- Burlingame, Pacific Gas and Electric Company (PG&E)
- Daly City, Pacific Gas and Electric Company (PG&E)
- East Palo Alto, Pacific Gas and Electric Company (PG&E)
- Foster City, Pacific Gas & Electric (PG&E)