Leviticus 27:11

As it is unlawful to sacrifice unclean animals they must be redeemed and the equivalent value plus a fifth paid into the sanetuary.

14, 15. The redemption of a dedicated house follows the same rule.

16-25. The redemption of a dedicated piece of land is complicated by the law of Jubilee (Leviticus 25). Its value is reckoned according to the amount of seed required to sow it (Leviticus 27:16), and a reduction made in proportion to the number of years till the next Year of Jubilee (Leviticus 27:18). The owner may redeem it at this price plus one fifth. If he does not, it goes to the sanctuary at the Year of Jubilee (Leviticus 27:20). But if the dedicant of the land has himself bought it from a third person, then at the Jubilee it reverts to the latter, and the dedicant must recompense the sanctuary by paying its redemption value calculated as before (Leviticus 27:22).