DC requires written agreements for party line fences exceeding standard height limits (7 ft residential, 10 ft commercial) under 12-A DCMR 3112. The agreement must be filed with the code official. Standard property line fences require proper setback from the public right-of-way.
Under 12-A DCMR 3112, party line (shared boundary) fences that exceed 7 feet in residential zones or 10 feet in commercial zones require a written agreement between both property owners, which must be filed with the code official. For standard-height fences on or near property lines, the fence must be entirely on the building owner's property or have neighbor consent. DC does not have a specific statute requiring neighbors to share fence costs (unlike some states with statutory fence-sharing laws). Disputes over boundary fences are typically resolved through civil litigation. The finished or decorative side of a fence is customarily but not legally required to face outward. DDOT permits are needed if any portion encroaches on public space.
Building on a neighbor's property without consent is a civil trespass. Party line fences without the required written agreement may be ordered modified or removed.
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