Solar permitting, licensing & interconnection in California
What homeowners and installers need to know about pulling permits, getting interconnected, and working under California contractor licensing rules — with direct links to government and utility resources.
License needed
C-46
Net metering
Net Billing Tariff (NEM 3.0)
Typical permit
Hours (SolarAPP+) to 5 business days (manual review)
Avg permit fee
$300–$800 typical residential
Going solar in California: the process
1. Pick a licensed installer. California requires installers to hold a C-46 Solar Contractor (C-46) issued by California Contractors State License Board (CSLB). Always verify your contractor's license is active before signing.
2. Sign the contract and submit permits. California's AB 1414 requires all jurisdictions to provide expedited permitting for residential solar. SolarAPP+ (the federally-funded automated permitting platform) is the fastest path — approvals in hours rather than weeks where supported. Where SolarAPP+ isn't yet live, jurisdictions must still process residential solar permits within 5 business days.
3. Installation. Most residential rooftop installs take 1–3 days of on-site work. Your contractor coordinates the timing and any roof staging.
4. Final inspection. The local AHJ inspects your install. Once passed, your installer submits the interconnection application to your utility.
5. Permission to Operate (PTO). After install and city/county inspection, your installer submits the interconnection application to your utility (PG&E, SCE, SDG&E, LADWP, or your local POU). PTO typically arrives within 30–60 days. Until PTO, your system cannot legally export to the grid.
Total typical timeline: 6–12 weeks from contract to PTO.
Net metering in California
California transitioned from NEM 2.0 to NEM 3.0 (officially Net Billing Tariff) in April 2023. Exported solar is now credited at the utility's Avoided Cost Calculator rate — roughly 25% of retail. Battery storage is effectively required for residential solar economics to work, with most new CA installs pairing solar with batteries to capture more value from time-of-use export rates.
Official net metering reference ↗Incentives summary
30% federal Residential Clean Energy Credit (ITC) — covers PV and battery. California's SGIP (Self-Generation Incentive Program) offers battery storage rebates up to $1,000/kWh for low-income households and $200/kWh for general market. Property tax exclusion on added home value through 2025 (extension pending).
Doing solar work in California: licensing & compliance
Required license: C-46 Solar Contractor
Issued by: California Contractors State License Board (CSLB)
- •Four years of journeyman-level experience in solar (or related — electrical, plumbing).
- •Pass two trade exams (Solar and Law/Business).
- •Post a $25,000 contractor's license bond.
- •Maintain workers' compensation insurance.
Permitting governance
Municipal — each city/county Authority Having Jurisdiction (AHJ) issues residential solar permits. The state mandates that all California jurisdictions accept SolarAPP+ submissions starting 2024.
Permitting reference ↗Interconnection process
Typical timeline: 30–60 days for PTO after install completion
After install and city/county inspection, your installer submits the interconnection application to your utility (PG&E, SCE, SDG&E, LADWP, or your local POU). PTO typically arrives within 30–60 days. Until PTO, your system cannot legally export to the grid.
California city-specific solar permitting
Detailed AHJ, utility, and timeline information for the highest-volume California cities.
Solar permitting in San Jose
San Jose Building Division (Permit Center)
Utility: Pacific Gas & Electric (PG&E)
SolarAPP+ enabledSolar permitting in Los Angeles
Los Angeles Department of Building and Safety (LADBS)
Utility: Los Angeles Department of Water and Power (LADWP)
Solar permitting in San Diego
San Diego Development Services Department
Utility: San Diego Gas & Electric (SDG&E)
SolarAPP+ enabledAll California resources
This guide was last reviewed 2026-06-03. Permitting, licensing, and incentive rules change. Always verify current requirements with the linked agencies before sizing a project.
Need help finding a contractor?
Browse California solar installers in our directory.
Browse California solar installers →