Brentwood, CA Solar Energy: Panel Permits (2026)

California law (AB 2188, codified in Gov. Code §65850.5) requires all cities to adopt an expedited, electronic permitting process for small residential rooftop solar (10 kW AC or less) and to issue permits within 3 business days of a complete application. Brentwood complies with this mandate through its online Citizen Self-Service (CSS) permitting portal and uses a standardized solar checklist aligned with the California Energy Commission's Solar Toolkit. Fees are capped at statutory limits (typically around $450 for residential PV, subject to periodic updates). Required documentation includes: system one-line electrical diagram, structural attachment details, equipment cut sheets (panels, inverters, combiner boxes), and a site plan showing setbacks from roof edges per the California Fire Code (Chapter 11B for residential solar pathways). Systems must maintain fire access pathways at roof ridges and setbacks at roof edges. Inspection is required after installation and before PG&E interconnection. Battery energy storage systems (BESS) such as Powerwalls are permitted alongside solar but have additional requirements under the California Electrical Code and California Fire Code, including spacing from egress and garage ignition sources. Under Civil Code §714, HOAs cannot prohibit residential solar; restrictions that reduce efficiency by more than 10% or increase cost by more than roughly $1,000 (periodically adjusted) are void. Homeowners should note that NEM 3.0 (the Net Billing Tariff adopted in 2023) significantly reduces export credits compared to prior net metering, making battery storage more economically attractive.