Property Line and Party Wall Dispute Over Boundary Wall

A landowner brought an action against a neighbor regarding a dispute over the boundaries of their adjacent properties, specifically concerning the ownership of a wall that the neighbor had partially demolished. The court of appeal affirmed a judgment that recognized the plaintiff's exclusive right to the entire wall based on the deed descriptions, which clearly indicated the wall belonged solely to the plaintiff's property and did not constitute a party wall, despite the neighbor's claim of co-ownership based on the wall's apparent position between the two lands. The highest court quashed this decision, reasoning that a wall built exclusively on one property, even if serving as a boundary marker, is presumed to be exclusive property unless there is evidence of acquisition of co-ownership, and the mere existence or use as a boundary does not automatically establish it as a party wall under the relevant civil code provisions.