Independent Educational Guide: California residential solar permit facts, sourced, dated, and confidence-scored. Not legal, engineering, or permit advice.

Foster City Solar Permit Guide

Pacific Gas & Electric (PG&E) territory · San Mateo County

Foster City Solar Permit Checklist
Printed from mygridpermit.com/california/foster-city/solar-permit-guide/ · Last verified 2026-08-08 · City of Foster City Community Development Department, Building Division / PG&E · Verify current requirements before relying on this checklist. Programs and fees change.
✓ Last verified 2026-08-083 official sources
Informational only. This page is not legal, engineering, or permit advice. Every fact below links to the official source it came from and shows how confident we are in it. Verify current requirements with City of Foster City Community Development Department, Building Division and PG&E before making a decision.

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.

Battery/solar incentive program on record

No battery/storage incentive program is on record for this locality.

Permit fees

  • SolarAPP+ design revision (4th and later): $25 (flat)

    First three design revisions are free; building permit fees also apply when filing through the Online Permit Center.

Confidence: Medium (0.75)

Source(s): Solar Permits

Rebates

Not yet verified.

Utility and generation supplier

Utility

Pacific Gas & Electric (PG&E)

Confidence: High (0.9)

Source(s): Solar Permits

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 Foster City) since 2017. PG&E continues to deliver the power and provide billing/customer service. Note: this organization rebranded from 'Peninsula Clean Energy' to 'WestLight Energy' — confirmed via a live 301 redirect from peninsulacleanenergy.com to westlightenergy.org this session; earlier records in this dataset citing 'Peninsula Clean Energy' by that name were not retroactively renamed this session and are flagged as a candidate for a future correction pass.

Confidence: High (0.8)

Source(s): In the Community

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.

Confidence: Medium (0.55)

Permit authority

City of Foster City Community Development Department, Building Division

Confidence: High (0.9)

Source(s): Solar Permits

Permit page: https://www.fostercity.org/424/Solar-Permits

Required documents

  • Active City of Foster City Business License (required when: always)
  • Residential PV Submittal Checklist (required when: always)
  • SolarAPP+ Approval Document (required when: always)
  • Completed online permit application (job value, project location) (required when: always)

Confidence: High (0.85)

Source(s): Solar Permits

Inspection steps

  • Inspections occur after the SolarAPP+ Approval Document is submitted
  • Maintain the Inspection Checklist for review during the inspection

Confidence: High (0.8)

Source(s): Solar Permits

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+ (standard PV installs only)
  • Other conditions:
    • Systems with main panel upgrades or battery storage are excluded from SolarAPP+ and require standard review

Confidence: High (0.8)

Source(s): Solar Permits

Official contacts

Confidence: High (0.9)

Need a solar installer who handles permits in Foster City?

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

Frequently Asked Questions

What utility serves solar customers in Foster City, California?

Pacific Gas & Electric (PG&E) is the interconnection and distribution utility for Foster City. The default electricity generation supplier is WestLight Energy (formerly Peninsula Clean Energy), a Community Choice Aggregator (CCA), separate from Pacific Gas & Electric (PG&E).

What documents are required for a solar permit in Foster City?

Commonly required documents include: Active City of Foster City Business License; Residential PV Submittal Checklist; SolarAPP+ Approval Document; Completed online permit application (job value, project location).

Who do I contact about solar permits in Foster City?

City of Foster City Building Division, phone 650-286-3227, email building@fostercity.org.

Disclaimers: This page is for informational purposes only and is not legal, engineering, financial, tax, or permit advice. GridPermit is not a solar installer, contractor, engineering firm, public utility, or government agency. Requirements, fees, and program terms change. Verify current requirements with City of Foster City Community Development Department, Building Division and PG&E before starting a project. Last verified 2026-08-08.

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