Height limitations in this chapter as so specified for each zoning district shall not apply to church spires, belfries, cupolas and domes, monuments, water towers, standalone noncommercial windmills, wind energy facilities, commercial communication towers, chimneys, smokestacks, flagpoles, radio towers, masts and aerials, accessory mechanical appurtenances usually located above the roof level or to parapet walls extending not more than four feet above the roof line of the principal building, but may be subject any supplemental height regulation associated with a specific use.