The following projections into required yards may be permitted:

Any open or enclosed porch or carport shall be considered a part of the building in the determination of the size of the required yard or lot coverage.

Accessory uses and buildings shall be located as provided for in § 75-18E.

District building height regulations shall not apply to flagpoles, radio or television antennas, transmission towers or cables, spires or cupolas, chimneys, elevator or stair bulkheads, penthouses, parapets or railings, water tanks or cooling towers, or any similar structures, provided that such structures are located on the roof and in their aggregate coverage occupy no more than 10% of the roof area of the building.

District building height regulations shall not apply to radio, television antennas and commercial communications towers.

Principal residential buildings per lot. Where two or more principal residential structures are permitted, by this chapter, to be located on the same lot, the minimum lot area per dwelling unit must be complied with.

Undersized lots. A residential lot of required or larger than required size, as set forth in this chapter, shall not be reduced in size for transfer of ownership if such lot so subdivided will form two or more lots which shall not be in compliance with the requirements for the minimum lot area per dwelling unit for the district in which such lot or lots are situated, except as provided in § 75-26.

Mixed use occupancy of same lot. If a permitted residential use and a permitted nonresidential use, other than a home occupation, are located in separate structures on the same lot in any district, the required lot area shall be the sum of the minimum required lot area for each use as set forth in the Density Control Schedule (§ 75-11) for that particular district.

Mixed use occupancy of same structure. If one or more permitted residential use and a permitted nonresidential use, other than a home occupation, are located in the same structure on the same lot, the required minimum lot area shall be either the minimum lot area required for the nonresidential use (as set forth in § 75-11), or the minimum lot area per each dwelling unit required for a two-family or multifamily residence [as set forth in § 75-28D(5)(a)], whichever is greater.