1 county-level rule, plus city-specific rules for 2 cities in Sutter County, California.
Verified from official government sources
Sutter County permits ADUs in all zones that allow residential uses. Attached ADUs are limited to 50% of the primary unit's floor area or 1,200 sq ft, whichever is less. Detached ADUs are typically capped at 850 sq ft (1,000 sq ft for 2+ bedrooms), expandable to 1,200 sq ft with a Conditional Use Permit.
2 cities in Sutter County have their own accessory structures rules. Each link goes to that city's dedicated page with code citations.
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