Leviticus 27:13-15

13If the owner wishes to redeem the animal, a fifth must be added to its value.

14“ ‘If anyone dedicates their house as something holy to the Lord, the priest will judge its quality as good or bad. Whatever value the priest then sets, so it will remain.

15If the one who dedicates their house wishes to redeem it, they must add a fifth to its value, and the house will again become theirs.