Regulation of historic places. As authorized under § 62.23(7)(em), Wis. Stats., no structure on any property that is listed on the National Registry of Historic Places in Wisconsin or the State Registry of Historic Places shall be razed, or structurally or aesthetically altered, without the approval of the Plan Commission. Any owner of such historic place desiring to raze or to structurally or aesthetically alter any structure thereon shall first apply for a permit as required under Chapter 140, Building Construction, of this Code. The Building Inspector shall inspect the structure and shall file a report with the Plan Commission within 20 days regarding the structural condition of the building and the economic feasibility of maintaining the structure as an historic building. The Plan Commission shall hold a hearing upon giving a Class 1 notice and, after reviewing the report of the Building Inspector and the testimony given and after considering any proposed structural or aesthetic alterations, shall, within 30 days, make findings and issue an order authorizing the Building Inspector to grant or deny the permit. Any person aggrieved by the order of the Plan Commission may file an appeal with the Board of Zoning Appeals within 30 days of such order.