Except within an area defined as an airport approach zone by the Federal Aviation Administration or other government agency, the height regulations as prescribed in this chapter shall not apply to the following:
A. 
Belfries.
B. 
Chimneys or smokestacks.
C. 
Church spires.
D. 
Conveyors.
E. 
Cooling towers.
F. 
Elevator bulkheads.
G. 
Fire towers.
H. 
Flagpoles.
I. 
Noncommercial grain elevators.
J. 
Ornamental towers and spires.
K. 
Public monuments.
L. 
Radio and television antennas.
M. 
Silos.
N. 
Water towers and standpipes.
O. 
Windmills (excluding small wind energy systems; see § 175-84.).
Public or semipublic service buildings, hospitals, institutions, schools, churches and temples may be erected to a height not exceeding 75 feet when the required side and rear yards are each increased by at least one foot for every foot of additional building height above the height regulations for the zoning district in which the building is located.