Oro Valley, AZ Fence Regulations: Neighbor Fence Rules (2026)

Arizona does not have a state-mandated fence-sharing statute. In Oro Valley, there is no requirement for neighbors to share the cost of a boundary fence. Each property owner is responsible for building and maintaining fences on their own property. Fences must be installed entirely within the builder's property line; placing a fence on or over the property line without the neighbor's written consent can result in a civil trespass claim. The finished side of a fence (the side without exposed posts or rails) is customarily faced toward the neighbor, though this is not a codified requirement in the Zoning Code. Property line disputes should be resolved through a professional boundary survey before fence construction. Block walls that straddle the property line by mutual agreement should be documented in a written easement or maintenance agreement recorded with Pima County. HOA CC&Rs in many Oro Valley communities may address boundary fencing standards, shared maintenance obligations, and approved materials. Fence height and setback rules under Zoning Code Chapter 23 apply regardless of the fence's proximity to the property line. Trees or vegetation growing through or damaging a neighbor's fence are the responsibility of the tree owner under Arizona common law.