Sutter County adopts ADU code updates to align with state law, sets local maximum size and ministerial approvals

Sep 30, 2026

The board adopted amendments to the county zoning and Sutter Point specific plan to align accessory dwelling unit (ADU) rules with state law (including Government Code 66323), allowing combinations of exempt ADUs and proposing a local maximum ADU size of 2,000 sq ft (capped at the size of the primary residence) along with other implementation details and an informational handout.

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Senior Planner Ravenna Soroia presented a package of amendments to the county zoning code and the Sutter Point specific plan to implement recent state ADU law changes, including the incorporation of Government Code 66323 that requires ministerial approval for combinations of certain ADUs. Soroia told the board staff had updated code citations, changed measurement to interior livable space, removed the zoning clearance requirement to shorten permitting timelines, and proposed a local maximum ADU size increase to 2,000 square feet while adding a provision that no ADU may exceed the size of the existing primary residence.

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