Accessory structures. All accessory structures shall be maintained
in a state of good repair and vertical alignment. All exterior appurtenances
or accessory structures which serve no useful purpose and are in a
deteriorated or dilapidated condition, which are not economically
repairable, shall be removed. Such structures include, but shall not
be limited to, porches, terraces, entrance platforms, garages, driveways,
carports, walls, fences, and sheds.