Wisconsin Statutes Taxation (Ch. 70 to 79) § 70.323. Assessment of divided parcel

(1) Determination of value. (a) If a parcel of real property is divided, the owner of a divided parcel may request a valuation of the divided parcels. A request shall be in writing and submitted to the treasurer of the taxation district in which the property is located. If the taxation district treasurer is in possession of the tax roll, the treasurer shall make the requested valuation. If the tax roll has been returned under s. 74.43, the taxation district treasurer shall forward the request to the county treasurer, who shall make the requested valuation.

(b) The appropriate treasurer shall, with the assistance of the assessor of the taxation district, attribute to each new parcel its value for the year of division. The value of each new parcel shall represent a reasonable apportionment of the valuation of the original undivided parcel, and the total of the new valuations shall equal the valuation of the original undivided parcel on January 1 of that year. The value of a new parcel as determined under this subsection is the value of that property for purposes of s. 70.32 for the year of division.