Mendocino County, CA Building Setbacks & Zoning: Structure Height Limits (2026)

Like setbacks, maximum structure height in unincorporated Mendocino County is governed by the zoning district under the Title 20 Inland Zoning Code rather than a single countywide cap. In the Rangeland District (Chapter 20.060), the building height limit is thirty-five (35) feet, while the 'A-G' Agricultural District (Chapter 20.052) permits a building height of up to fifty (50) feet; both reference the general height exceptions in Section 20.152.025 (which typically allow features like chimneys, water tanks, and certain agricultural structures to exceed the base limit). Residential districts such as R-1 Single-Family Residential (Chapter 20.072) set their own height limits in their development-standard sections. Accessory structures are treated separately: under Section 20.164.015, the favorable 5-foot setback for a detached accessory building only applies if the building does not exceed fifteen (15) feet in height at the ridge (and 500 square feet of floor area); taller or larger accessory buildings must meet the primary district yard and height standards. The strictest height controls are in the Coastal Zone. Under Section 20.504.015 of the Division II Coastal Zoning Code, in highly scenic areas west of Highway 1, new development is limited to eighteen (18) feet above natural grade unless an increase would not affect public views to the ocean, and all development in highly scenic areas must protect coastal views. Because the applicable limit depends entirely on the district and on inland-versus-coastal location, the parcel's zoning must be confirmed.