(1) Use Regulations. The specific uses permitted in this district shall be the erection, construction, alteration, or use of buildings and/or land for:

(a) The uses permitted in "R-3" Residential Districts, subject to all qualifications imposed on such uses.

(2) Area Regulations.

(a) Lot Width and Area. The minimum lot width shall be 35 feet; and the minimum lot area shall be 3,150 square feet.

(b) Occupied Area. Not more than 40% of the lot area shall be occupied by buildings.

(c) Open Area. The open area shall be not less than 60% of the lot area and shall consist of front, side and rear yards of at least the minimum dimensions herein designated.

(d) Building Set-back Line. The building set-back line shall be 15 feet from all street lines.

(e) Front Yards. The minimum depth of a front yard shall be the depth required between the street line and the building set-back line, as herein specified.

(f) Side Yards.

(.1) Every detached dwelling shall have two side yards, each of which shall be not less than 8 feet wide; provided, that every such dwelling located on a corner lot shall have the building set-back on the intersecting street adjudged a side yard (which shall not be less than the set-back required), and the other or inside yard may be reduced to a width of not less than 6 feet (subject to exception for existing buildings, see § 14-104(12)).

(.2) Every semi-detached dwelling shall have a side yard not less than 16 feet wide; provided, that every such dwelling located on a corner lot shall have the building set-back on the intersecting street adjudged a side yard and its width shall be not less than the set-back required;

(.3) Every building other than a dwelling shall have two side yards, neighbor of which shall be less than 10 feet; provided, that every such building located on a corner lot shall have the building set-back on the intersecting street adjudged a side yard which shall not be less than the set-back required.

(g) Courts. Courts when used shall be in addition to the open area required. The minimum widths of courts shall be the same as the minimum widths required for side yards, except inner courts and open courts between wings of the same buildings, which are governed by the provisions of § 14-231(1).

(h) Rear Yards. The minimum depth of a rear yard shall be 20 feet.

(3) Height Regulations.

(a) The maximum height of a dwelling shall be 35 feet above the average ground level at the base of the building, but in no case over three stories.

(b) The permitted height of non-residential buildings shall be 35 feet, except that one foot of additional height may be added for each additional foot the building sets back from all lot lines; provided, however, that the maximum height of any such building shall be 60 feet (subject to the provisions of § 14-231(2)).

(4) Off-street Parking. See § 14-1400 of this Title.