Except as otherwise provided in this chapter, no unit owner may make any alteration that would jeopardize the soundness or safety of the property, reduce the value thereof, impair any easement or hereditament, or change the exterior appearance of a unit or any other portion of the condominium not part of the unit.
Wis. Stat. § 703.06
2003 Wis. Act 283, which affected this section, contains extensive explanatory notes.