Solar Energy in Mendocino County, CA (2026)

2 rules for unincorporated Mendocino County, California.

Verified from official government sources

Note: These county rules apply to unincorporated areas of Mendocino County. If you live within an incorporated city, that city's own rules apply: see the city list below.

Panel Permits

Mendocino County processes small residential rooftop solar permits through an administrative, nondiscretionary checklist the Building Official adopts and posts on the county website, capped at systems no larger than 10 kilowatts AC or 30 kilowatts thermal on a single or duplex dwelling. The checklist tracks the state's Solar Permitting Guidebook and can only be adjusted for documented local conditions.

Mendocino County Solar Panel Permit Process

Some Restrictions

Mendocino County Code § 18.40.030 (Application Standards)

The Director of Planning and Building Services shall adopt an administrative, nondiscretionary expedited review process for small residential rooftop solar energy systems, including standard plans and checklists. The permit process, standard plans and checklists shall set forth all requirements with which the small residential rooftop energy system must comply in order to be eligible for expedi...

Full ordinance details →Official source ↗

Expedited Solar Permitting

Once a small residential rooftop solar application in unincorporated Mendocino County is deemed complete, the Building Official must administratively approve it and issue permits without discretionary review under the county's AB 2188 ordinance. The county can only require a discretionary use permit if the Director finds, on substantial evidence, a specific adverse health or safety impact with no feasible fix, and that finding is appealable to the Planning Commission.

Mendocino County Expedited Solar Permit Review

Some Restrictions

Mendocino County Code § 18.40.035 (Permit Review and Inspection Requirements)

Upon confirmation by the Building Official of the application and supporting documentation being complete and meeting the requirements of the checklist, the Building Official shall perform an expedited review of the application and all submittals. The Building Official shall administratively approve the application and issue all required permits or authorizations, following the payment of all r...

Full ordinance details →Official source ↗

All Mendocino County ordinances

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