In any district, public or semipublic buildings, such as hospitals, hotels, churches, sanitariums or schools, either public or private, where permitted, may be erected to a height not exceeding seventy-five (75) feet, provided that such buildings shall have yards the depth and width of which shall be increased one (1) foot on all sides for each additional foot that such buildings exceed the specified height limit as established by the regulations of the district in which such buildings are situated.

Dwellings in Districts "A," "R-1," "R-1A," "R-1B," "R-1C" and "R-2" may be increased in height not exceeding ten (10) feet in addition to the limitation of two and one-half (2 1/2) stories or thirty-five (35) feet, as prescribed in such districts, provided that two (2) side yards of not less than fifteen (15) feet in width each are provided. In no case shall such dwellings, however, exceed three (3) stories in height.

Parapet walls and false mansards shall not extend more than six (6) feet above the height limit. Flagpoles, chimneys, cooling towers, electric display signs, elevator bulkheads, penthouses, gas tanks, grain elevators, stacks, storage towers, radio, television or microwave towers, ornamental towers, monuments, cupolas, domes, spires, standpipes and necessary mechanical appurtenances may be erected as to height in accordance with existing or hereafter adopted ordinances.

On through lots one hundred twenty-five (125) feet or less in depth, the height of a building may be measured from the curb level of either street. On through lots of more than one hundred twenty-five (125) feet in depth, the height regulations for the street permitting the greater height shall apply to a depth of not more than one hundred twenty-five (125) feet from the street.

The establishment of an airport or heliport within the City shall be in conformity with the regulations and procedures set forth by the Federal Aviation Agency as required by law and reviewed by the Zoning Commission.

Every part of a required yard or court shall be open from its lowest point to the sky unobstructed, except for the ordinary projections of sills, belt courses, canopies, cornices, chimneys, buttresses, ornamental features and eaves; provided, however, that none of the above projections shall extend into a court more than six (6) inches nor into a minimum yard more than thirty-six (36) inches; and provided further, that canopies or open porches having a roof area not exceeding sixty (60) square feet may project a minimum of six (6) feet into the required front or rear yard; open paved terraces may project not more than ten (10) feet into a front yard and existing open porches extending into the required yard shall not be enclosed.

An open fire escape may project into a required side yard not more than half the width of such yard, but not more than four (4) feet. Fire escapes, solid floored balconies and enclosed outside stairways may project not more than four (4) feet into a required rear yard.

A detached accessory building may be connected with the main building by a lightly constructed, covered passage, open on each side, not more than six (6) feet wide inside, the roof of which is not more than ten (10) feet high at its highest point and is not an extension of the roof of the main building.

No rear yard shall be required in Districts "C-1" to "M-2," inclusive, on any lot used for business or industrial purposes, the rear line of which adjoins a railway right-of-way or which has a rear railway track connection.

In computing the depth of a rear yard for any building where such yard abuts an alley, one-half (1/2) of such alley may be assumed to be a portion of the rear yard.

Condominium ownership shall not constitute violation of the lot and yard requirements of this Chapter.

On lots of irregular shape or when a residence is located at an angle to the rear property line, the required rear yard setback may be measured by averaging the area between the back of the residence and the rear property line. The area divided by the width of the residence must equal or exceed the required setback. However, in no case shall a residence be located less than twenty (20) feet perpendicular to a rear property line.