Trinity County, CA Fence Regulations: Fence Requirements (2026)

Because Trinity County has no incorporated cities, fence requirements come from the County's own codes. The Building Code (Sec. 15.04.140, Ordinance 1373) treats fences up to 7 feet as permit-exempt but expressly conditions them: such fences 'shall still meet all zoning requirements as well as any requirements of the Department of Transportation.' The County also defines a 'Fence' (Sec. 15.04.040) as 'a barrier, railing, or other upright structure, typically of wood or wire, enclosing an area of ground to mark a boundary, control access, or prevent escape.' On the zoning side, Title 17 districts set their own fence caps - for instance, the R-2 district (Sec. 17.17.130(F)) limits fences and walls to six feet, and three feet in a required front yard on reversed frontage. The most specific fence requirement is for swimming pools: Chapter 17.30 includes pool-safety provisions requiring an enclosing barrier fence around the pool area, with plan and sectional view dimensions of the barrier fence submitted for review. Agricultural fencing is common in the rural and agricultural districts and is generally allowed subject to zoning. Because rules differ between residential, commercial, and agricultural zones, owners should confirm their district's specific fence requirements with the Planning Division before building.