Height exceptions. With the exception of the Scenic Overlay (SO) District, which is specified in more detail in Article VI, § 300-6.17, the following structures shall be exempt from the height limitations set forth in the schedule of district regulations: farm structures, private home antennas, spires, belfries, cupolas, water tanks, ventilators, chimneys, solar energy devices, windmills for personal use, transmission towers, flag poles, skylights, and other appurtenances usually required be placed above the roof level and not intended for human occupancy.