Downey, CA Solar Energy: Panel Permits (2026)

Section 8150.08 sets the substantive requirements behind Downey's solar permit process, separate from the expedited review timeline in § 8150.10. Every solar energy system installed in the city must meet the health and safety standards imposed by the State of California, Los Angeles County, and the City of Downey (§ 8150.08(a)). Systems that heat water for single-family homes, commercial buildings, or swimming pools must carry certification from an accredited listing agency recognized under the California Plumbing and Mechanical Code (§ 8150.08(b)). Systems that generate electricity must meet the safety and performance standards of the California Electrical Code, IEEE standards, and accredited testing labs such as Underwriters Laboratories, plus any applicable Public Utilities Commission safety and reliability rules (§ 8150.08(c)).

To standardize intake, the Building Official must prepare a standard plan and submittal checklist specifically for small residential rooftop systems, plus a separate checklist for larger, non-small systems; both must be posted at the Building and Safety counter and on the City's website (§ 8150.08(d)). Applicants for a small residential rooftop solar permit may submit their entire application through electronic submittal, defined by § 8150.06 as email, internet, or facsimile (§ 8150.08(e)). Electronic signatures are accepted in place of a wet signature on any form, application, or document tied to the permit (§ 8150.08(f)). These submittal rules work together with the three-business-day expedited review timeline in § 8150.10 to move rooftop solar permits through the Building and Safety Division without requiring an in-person visit.