The following exceptions may be made to the yard requirements:
(a) Where, on the effective date of this Zoning Code (Ordinance 1301, passed July 6, 1976), 40% or more of a frontage was occupied by two or more buildings, then the front yard is established in the following manner.
(1) Where the building farthest from the street provides a front yard not more than ten feet deeper than the building closest to the street, then the front yard for the frontage is and remains an average of the then existing front yards.
(2) Where division (a)(1) does not apply and a lot is within 100 feet of a building on each side, then the front yard is a line drawn from the closest front corners of the two adjacent buildings.
(3) Where neither division (a)(1) or (a)(2) applies and the lot is within 100 feet of an existing building on one side only, then the front yard is the same as that of the existing adjacent building.
(b) Sills, belt courses, window air conditioning units, chimneys, cornices and ornamental features may project into a required yard a distance not to exceed 24 inches.
(c) Filling station pumps and pump islands may occupy required yards, provided they are not less than 15 feet from all lot lines.
(d) Signs shall be in accordance with § 1246.08.
(e) Open fire escapes, fireproof outside stairways and balconies opening upon fire towers, and the ordinary projections of chimneys and flues into a rear yard for a distance of not more than three and one-half feet when so placed as to not obstruct light and ventilation, may be permitted by the Zoning Inspector.
(f) Open, unenclosed porches (not glassed in) may extend ten feet into a front yard.
(g) Terraces which do not extend above the level of the ground (first) floor may project into a required yard, provided these projections are at least two feet from the adjacent side lot line.
(h) No side yards are required where dwellings are erected above commercial structures, except such side yard as may be required for a commercial building on the side of a lot adjoining a Residential District.
(i) Accessory buildings may be located in a rear yard but may not occupy more than 30% of the yard area.
(j) Any accessory building closer than ten feet to a main building shall be considered part of the main building and shall be provided with the side and rear yards required for the main building.
(k) An accessory building more than ten feet from a main building may be erected within two feet of a side or rear lot line, provided it is located at least 60 feet from the front street line.
(l) Where a garage is entered from an alley, the garage must be kept ten feet from the alley line.
(`80 Code, § 1250.03) (Ord. 1301, passed 7-6-76; Ord. 1425, passed 4-2-79)