La. Civ. Code art. 491
Current with operative changes from the 2024 Third Special Legislative Session
Buildings, other constructions permanently attached to the ground, standing timber, and unharvested crops or ungathered fruits of trees may belong to a person other than the owner of the ground. Nevertheless, they are presumed to belong to the owner of the ground, unless separate ownership is evidenced by an instrument filed for registry in the conveyance records of the parish in which the immovable is located.
La. C.C. § 491