No building shall be erected, converted, enlarged, reconstructed or structurally altered to exceed the height limit hereinafter established for the district in which the building is located, except that penthouses or roof structures for the housing of elevators, stairways, tanks, ventilating fans or similar equipment required to operate and maintain a building and fire or parapet walls, skylights, towers, steeples, state lofts and screens, flagpoles, chimneys, radio and television aerials, smokestacks, wireless masts, water tanks and similar structures may be erected above the maximum height limits established herein. No such structure shall occupy more than 25% of the building or be used for residential purposes.
(`94 Code, § 1175.12) (Ord. 26-82, passed 12-28-82) Penalty, see § 154.999