Nothing in the requirements of this Chapter relating to Lot Area per Dwelling Unit, Lot Width of Yards shall be deemed to prohibit the erection of one Single-family Dwelling upon a Nonconforming Lot in any R-1 or R-2 District, the width or Lot Area per Dwelling Unit of which is less than prescribed, provided such a Nonconforming Lot was in existence and recorded at the time of enactment of the first Zoning Ordinance on May 24, 1926; or, if not recorded, at least equal in area to the recorded Lots in the plan of Subdivision.
In any Residential or C-1 District where a Lot is situated between two Lots having on each a Principal Building within 25 feet of Side Lot Lines which projects beyond the established Front Yard and has been so maintained since the enactment of the underlying ordinance (Ordinance No. 2519, enacted June 26, 1972), the Front Yard on such Lot may be the average of Front Yards of existing Buildings.
In any Residential or C-1 District where a Lot adjoins only one Lot having a Principal Building within 25 feet of Side Lot Lines which projects beyond the established Front Yard and has been so maintained since the enactment of the underlying ordinance (Ordinance No. 2519, enacted June 26, 1972) the Front Yard on such Lot may be the average of the Front Yard of said existing Building and the established Front Yard.
In any district, the Building Height restrictions may be exceeded by:
1303.1. 
Chimneys, smokestacks, flagpoles, skylights;
1303.2. 
Place of Worship spires and towers;
1303.3. 
Penthouse or roof Structures required for enclosure for stairs and equipment necessary to the operation of the Building, provided that the total height of such a Penthouse and/or roof Structure shall not exceed 14 feet.
These Height exceptions shall not apply to any Communications Antennas or Communications Towers.
A buttress, chimney, cornice, pier or pilaster projecting not more than 18 inches from the wall of the Building may project in a required Side or Rear Yard. A roof overhang, not more than 18 inches from the wall of the Building, may project into a required front, Side or Rear Yard.
An unenclosed porch, not more than one Story or 14 feet in height, may be erected in the required Front and Rear Yard of properties situated in the R-1, R-2 and R-3 Districts, provided that it shall not extend more than 10 feet into a required Front or Rear Yard, or extend into the required Side Yard.