Wis. Stat. § 215.20: Property improvement loans.

(1) For the purpose of this section, a property improvement loan means a loan, the proceeds of which are used to repair, modernize, alter, furnish, equip or improve the real estate or the structure upon it, or both. As used in this section, loans made for the purpose of furnishing or equipping a structure shall be made to the owners thereof only.

(2) An association may make, buy, sell and hold property improvement loans to such persons, for such purposes, in such individual and aggregate amounts, and upon such terms as the division by rule prescribes.