6 rules for unincorporated Coconino County, Arizona.
Verified from official government sources
Coconino County zones its huge unincorporated high country, so the county zoning ordinance—not Arizona statute—sets fence heights. No state cap exists; six feet in side and rear yards is typical, lower near the front.
Coconino County requires building permits for masonry and block walls that carry structural and snow-region wind loads. Short wood or wire fences are often exempt. Call Arizona 811 before digging; cities permit separately.
Arizona has no shared boundary-fence statute like California's. Each owner is responsible for the fence on their own land. A wall or fence straddling the line is settled by agreement or the courts.
Coconino County enforces adopted building codes on unincorporated land, so a retaining wall above the code threshold—generally four feet—needs a permit and engineering. Snowmelt and monsoon drainage must be handled or you face civil liability.
Arizona law requires a pool barrier statewide. A.R.S. §36-1681 mandates a five-foot wall, fence, or barrier around the pool with self-latching gates—the rule holds even in the cooler high country.
A.R.S. §36-1681(B)
Be entirely enclosed by at least a five foot wall, fence or other barrier as measured on the exterior side of the wall, fence or barrier.
In Coconino's pine country, wood, split-rail, and wildlife-friendly wire fencing are as common as block. The county zoning ordinance and any HOA or Sedona design rules set material limits; open range shapes rural fencing.
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