La. Civ. Code art. 3493
Current with changes from the 2024 legislative session, Chs. 3, 6-496, effective on or before 7/1/2024
When damage is caused to immovable property, the one year prescription commences to run from the day the owner of the immovable acquired, or should have acquired, knowledge of the damage.
La. C.C. § 3493