La. Civ. Code art. 676
Current with operative changes from the 2024 Third Special Legislative Session
When a solid masonry wall adjoins another estate, the neighbor has a right to make it a common wall, in whole or in part, by paying to its owner one-half of the current value of the wall, or of the part that he wishes to make common, and one-half of the value of the soil on which the wall is built.
La. C.C. § 676