Wis. Stat. § 788.015

A provision in any written agreement between a purchaser or seller of real estate and a real estate broker, or between a purchaser and seller of real estate, to submit to arbitration any controversy between them arising out of the real estate transaction is valid, irrevocable and enforceable except upon any grounds that exist at law or in equity for the revocation of any agreement. The agreement may limit the types of controversies required to be arbitrated and specify a term during which the parties agree to be bound by the agreement.