Caldwell, ID Fence Regulations: Neighbor Fence Rules (2026)

Caldwell's fence ordinance (Section 10-02-07) controls height, setback, and material, but it does not by itself decide who pays for a fence on a shared property line. For street-frontage fences installed after December 1, 2019, the city requires the finished or "good" side to face the exterior of the property, a neighbor-facing aesthetics rule. Cost-sharing and partition-fence disputes between adjoining owners are governed by Idaho state law, Title 35 (Fences). Under Idaho Code Section 35-103, when adjoining landowners share an enclosure and one needs a partition fence on the boundary line, the other party, once notified in writing, must erect one-half of the fence; if that party fails to complete its half within six (6) months, the notifying owner may build the entire fence and collect one-half the cost by law, with a lien on the neighbor's land. Idaho Code Section 35-102 defines a "lawful fence" for stock-control purposes (for example, a post-and-board fence with the top board at least four feet from the ground, or wire fence at least 47 inches high), which is an agricultural standard separate from city zoning height limits. Because boundary location and shared-cost rights involve both city aesthetics rules and state law, neighbors should confirm the exact property line by survey before building.