Leviticus 27:12-14 Evangelical Heritage Version (EHV)
12 so that the priest may assess it. Whatever value is set by the priest, whether high or low, will be binding. 13 But if he does indeed redeem it, he must add one-fifth to its value.
14 When a person dedicates his house as holy to the Lord, the priest shall assess it. Whatever value the priest assesses, whether high or low, will be binding.