Stanislaus County, CA Accessory Structures: Shed Rules (2026)

Stanislaus County treats sheds as detached accessory structures under the Title 21 Zoning Ordinance, which allows detached accessory buildings whose use is incidental to the main building or primary property use (e.g., Section 21.20.020(I) in the A-2 district). Per county Planning guidance, a one-story detached accessory structure used as a tool and storage shed is exempt from a building permit only if its floor area is not greater than 120 square feet; sheds larger than that require a building permit. A building-permit exemption is not a zoning exemption, so even a permit-exempt shed must still comply with the setback and lot-coverage rules of the parcel's zoning district. County Planning advises that residential setbacks are generally five feet from each side and rear property line and fifteen feet from the ultimate front property line, and the ordinance was amended to let detached accessory buildings use the setback allowed by the adopted Uniform/California Building Code. Because exact coverage and setback requirements vary by zone (A-2, R-A, R-1, etc.) and parcel, the county directs owners to confirm specifics with the Planning Department at (209) 525-6330. Structures must be built concurrent with or after the main building (Section 21.08.020). Always verify with the county before building, as these figures come from departmental guidance rather than a single code section.