Mendocino County, CA Building Setbacks & Zoning: Setback Rules (2026)

Mendocino County does not have a single countywide setback figure; required front, side, and rear yards are established by each zoning district in the Title 20 Inland Zoning Code, which applies to all unincorporated land outside the Coastal Zone. In the rural and agricultural districts that cover most of the County, setbacks are large: both the 'A-G' Agricultural District (Chapter 20.052) and the Rangeland District (Chapter 20.060) require front and rear yards of fifty (50) feet, with setback exceptions in the respective .045 sections. To accommodate small legacy parcels, those districts provide that any nonconforming parcel less than five (5) acres shall observe a minimum front, side, and rear yard of twenty (20) feet. More urbanized residential districts such as R-1 Single-Family Residential (Chapter 20.072) and R-R Rural Residential (Chapter 20.048) have their own, generally smaller, yard requirements set out in their development-standard sections. Detached accessory buildings receive relief: under Section 20.164.015, a detached garage, storage shed, or similar detached accessory building not exceeding fifteen (15) feet in height at the ridge and five hundred (500) square feet of floor area, or uncovered decks and porches, may observe a five (5) foot setback. Eaves, canopies, and similar roof features may overhang into a required yard up to two (2) feet. In the Coastal Zone, the Division II Coastal Zoning Code controls and adds shoreline, blufftop, and geologic setbacks; example coastal projects have required setbacks such as 25 feet from the bluff edge. Because standards differ so much by district and inland-versus-coastal location, the exact zoning of a parcel must be checked before relying on any setback figure.