Wis. Stat. § 16.851: Plans for state buildings, structures or facilities.

Except as the department otherwise provides by rule, records of the department containing plans or specifications for any state-owned or state-leased building, structure or facility, or any proposed state-owned or state-leased building, structure or facility, are not subject to the right of public inspection or copying under s. 19.35 (1). If the department transfers any records containing any such plans or specifications to any other authority as defined in s. 19.32 (1), the department shall require the authority to agree in writing not to make the record available for public inspection or copying except as the department otherwise permits by rule.