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

The Siskiyou County Building Division advises that a building permit is not required for fences not exceeding six feet in height. This is more conservative than the statewide California Building Code (Section 105.2), which exempts fences up to seven feet. Even when a fence falls within the permit-exempt category, the county states that all proposed fencing is subject to Planning Division approval and to the applicable standards set forth in the county ordinance, so owners should confirm zoning compliance and setback or vision-clearance issues before building. Fences taller than the exempt height, fences combined with retaining walls, or fences serving as required pool barriers may trigger a building permit and structural review. Agricultural fencing and rural parcels can have different practical considerations given the county's large lot sizes and zoning districts (such as AG-1 and AG-2). Because the zoning code does not assign a specific numeric height cap to fences, the permit threshold is the main trigger for formal review. Owners should contact the Siskiyou County Planning Division and Building Division to verify whether their specific project requires a permit, particularly where a fence is near a road, a corner, or a property line.