Merced County, CA Fence Regulations: Permit Requirements (2026)

Under Section 18.34.030(E)(1) of the Merced County Title 18 Zoning Code, fences and walls higher than seven feet require a Building Permit from the County. Fences and walls that stay within the height limits of Chapter 18.34 are expressly exempt from the zone setback requirements (Section 18.30.040.C), meaning a conforming-height fence can be placed at the property line. Retaining walls less than three feet in height above finished grade are likewise exempt from setbacks. Separate from zoning, the California Building Code (Section 105.2) generally exempts fences not over 7 feet high from a building permit, which aligns with the county's 7-foot threshold. Even when no building permit is required, all fences must comply with the sight-distance triangle rule (nothing over 2 feet 6 inches), the corner-lot setback (over 2 feet 6 inches must be 16 feet from the face of curb), and the material restrictions in Section 18.34.020. Projects in special plan areas, on cul-de-sacs of major subdivisions, or as a condition of a use permit may carry additional fencing requirements. Because requirements vary by zone and project, applicants should confirm permit needs with the Merced County Planning and Building & Safety divisions before construction.