La. Civ. Code art. 2495
Current with operative changes from the 2024 Third Special Legislative Session
When an immovable described as a certain and limited body or a distinct object is sold for a lump price, an expression of the extent of the immovable in the act of sale does not give the parties any right to an increase or diminution of the price in case of surplus or shortage in the actual extension of the immovable.
La. C.C. § 2495