A. 
The height limitations of this chapter shall not apply to silos, church spires, belfries, cupolas and domes not used for human occupancy.
B. 
Chimneys, ventilators, skylights, water tanks, television and radio antennas and similar features and necessary mechanical appurtenances usually carried on and above the roof level may exceed the height limitations of this chapter but not more than 20 feet.
C. 
The provisions of this chapter shall not apply to prevent the erection of a parapet wall or cornice for ornament extending above height limits of this chapter by not more than five feet. Public and quasi-public buildings, schools, churches and other similar permitted uses shall increase the front, rear and side yards by one foot for each foot by which such buildings exceed the height limit herein established for such zone in which it is located.
D. 
When Federal Aviation Administration or other regulations which are promulgated to protect the health, safety and welfare are more restrictive than the height limitations of this chapter, such regulations shall supersede this chapter.
Any parcel of land with an area or width less than that prescribed for a lot in the zone in which such lot is located, which was under one ownership and in existence at the time of the adoption of this chapter, and where the owner thereof owns no adjoining land, may be used as a lot for any purposes permitted in the zone, provided that the minimum lot size requirements for such lot shall be 7,500 square feet of lot area and 60 feet of lot width, and further provided that all other regulations prescribed for the zone by this chapter are complied with.
A. 
Front yards. In such case in a residential zone where the frontage on the same side of the street within 500 feet of the lot line is 50% or more developed, then the required front yard for a new structure may be modified to the average for such existing development. Otherwise, the requirements of Article XX, § 270-156, shall apply.
B. 
Side yards. In such cases of lots which comply with the provisions for modification of § 270-124, combined total side requirements, as specified in Article XX, § 270-156, shall be reduced by six inches for each foot by which a lot is less than the minimum lot width requirement specified in such schedule for the zone in which located. In any case, the side yard area shall not be reduced to less than 50% of the requirement of such schedule.
Where the topography is such that, as determined by the Zoning Officer, access to the private garage built back of the front building line as required by this chapter is impracticable, it shall be permissible to place such building, not exceeding 12 feet in height, within the front yard space but not closer to the street line than 18 feet.