La. Civ. Code art. 494
Current with operative changes from the 2024 Third Special Legislative Session
When the owner of an immovable makes on it constructions, plantings, or works with materials of another, he may retain them, regardless of his good or bad faith, on reimbursing the owner of the materials their current value and repairing the injury that he may have caused to him.
La. C.C. § 494