The building height limitations of this Zoning Ordinance shall be modified as follows:
1. Chimneys, cooling towers, elevator bulkheads, fire towers, monuments, penthouses, stacks, stage towers or scenery lofts, tanks, water towers, ornamental towers and spires, radio, cellular communication, or television towers, or necessary mechanical appurtenances may be erected to a height allowed in the zone district in which the structure is located and shall meet all height requirements stated in the adopted ordinances of the City.
2. Public, semipublic or private service buildings, hospitals, sanatoriums, schools, business colleges and related structures, and churches and temples, when permitted in a district, may be erected to a height not exceeding 125 feet, if the building is set back from each property line at least one foot for each foot of additional building height above the height limit otherwise provided in the district in which the building is located.
3. Single-family dwellings and two-family dwellings in the residence districts may be increased in height by not more than ten feet when two side yards of not less than 15 feet each are provided, but they shall not exceed three stories in height.