(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 "RC-2" Residential Districts subject to all qualifications imposed on such uses;

(b) Attached residential dwellings of all classes permitted in any residential district.

(2) Area Regulations.

(a) Lot Width and Area. There shall be no required minimum lot width or area in this district.

(b) Occupied Area. Subject to all other provisions and requirements of this district, buildings may occupy up to 100% of the lot area, except that buildings of 5 stories or less shall occupy not more than 80% of the lot area on intermediate lots, and 90% of the lot area on corner lots.

(c) Open Area. Open area shall be determined by the other provisions and requirements of this district, except that buildings of five stories or less shall have an open area of not less than 20% of the lot area on intermediate lots and 10% on corner lots, which open area may consist of front, side or rear yards and open courts. Any open area used shall comply with the minimum dimensions specified in (d), (e) and (f) of this section.

(d) Building Set-Back Line. No building set-back line shall be required in this district, subject to the provisions of (.2) and (.3) below.

(e) Yards and Courts. The following restrictions shall apply to all properties within this district, with the exception that subsections (.1), (.2), and (.3) below shall not apply to any lot for which the occupied area of buildings is 40% or less of the lot area.[44]
(.1) Additions to Existing Buildings, and Newly Erected Buildings which Contain Less than Three Families:

(.a) Yards and Courts with Legally Required Windows. Any wall with one or more legally required windows shall be a minimum horizontal distance of fifteen feet from (1) the opposite side of any street which the wall faces, (2) any facing lot line which is not a street line, (3) any opposing wall on the same lot; provided, that every court between wings of the same building shall have no required minimum horizontal dimension but the depth shall not be greater than the width of the court, and every inner court shall have a minimum horizontal dimension equal to or greater than the average height of the walls forming the court.

(.b) Yards and Courts Without Legally Required Windows. Yards and courts without legally required windows shall be governed by the following provisions:

Front Yards. No front yards shall be required.

Side Yards and Open Courts. When side yards or open courts are used, except open courts between wings of the same building, they shall have a minimum width of five feet for a building not over five stories in height and a minimum width of eight feet for buildings of over five stories (subject to exception, see § 14-104(12)).

Open Courts Between Wings of the Same Building. The minimum width between wings of the same building shall be 12 feet.

Inner Courts. The least dimensions of an inner court shall be eight feet. Minimum area of such court shall be 100 square feet. Such courts of less area than 300 square feet shall not be permitted for any building used for dwelling purposes except when used as vent shafts.

(.2) Newly Erected Buildings Containing Three or More Families, and Less than Five Stories in Height:

(.a) Yards and Courts With Legally Required Windows. Any wall with one or more legally required windows shall be located so that every point of the wall shall be a minimum horizontal distance which is not less than the height of the wall, from: (1) the opposite side of any street which the wall faces, (2) any facing lot line which is not a street line, (3) any opposing wall on the same lot; provided, that every inner court shall have a minimum horizontal dimension equal to or greater than the average height of the walls forming the court.

(.b) Yards and Courts Without Legally Required Windows. Yards and courts without legally required windows shall be governed by the following provisions:

Front yards and rear yards shall not be required.

Side yards and open courts, when used, shall have a minimum width of eight feet.

Open courts between wings of the same building shall have a minimum width of twelve feet.

Inner court shall have a least dimension of eight feet, and a minimum area of one hundred square feet.

(.3) Newly Erected Buildings Containing Three or More Families and Five Stories or Over in Height.

(.a) Yards and Courts With Legally Required Windows. Any wall with one or more legally required windows shall be located so that every point of the wall shall be a minimum horizontal distance of fifty feet from: (1) the opposite side of any street which the wall faces, (2) any facing lot line which is not a street line, (3) any opposing wall on the same lot; provided, that every court between wings of the same building shall have no required minimum horizontal dimension but the depth shall not be greater than the width of the court, and every inner court shall have a minimum horizontal dimension equal to or greater than the average height of the walls forming the court.

(.b) Yards and Courts Without Legally Required Windows. Yards and courts without legally required windows shall be governed by the following provisions:

Front and rear yards shall not be required.

Side yards and open courts, when used, shall have a minimum width of eight feet.

Open courts between wings of the same building shall have a minimum width of twelve feet.

Inner courts shall have a least dimension of eight feet, and a minimum area of one hundred square feet.

(3) Height Regulations. There shall be no height regulations except as height may be limited by the other applicable provisions of this district.

(4) Floor Area. No building in this district shall have a gross floor area (as defined in Section 14-102(25)) greater than that permitted under the provisions herein set forth:

(a) Basic Floor Area. Every building in this district shall be permitted a gross floor area equal to 350% of the area of the lot.

(b) Additional Floor Area. In addition to the Basic Floor Area, any building in this district shall be permitted additional gross floor area in accordance with the provisions of Chapter 14-1300.[45]

(.1) Buildings Facing a Street More than Sixty Feet in Width: Where a building faces upon a street which is more than 60 feet in width, the gross floor area of the building may be increased by 5% of the area of the lot for each one foot of width of the street over 60 feet; provided, that where a building faces two or more streets, it shall receive additional gross floor area for the width of the widest street, and that street only;

(.2) Buildings Constructed Back from Streets Fifty Feet or More in Width: Where a building or any portion thereof is constructed back, at ground level, at least 10 feet from the street line of any street of 50 feet or more in width, there shall be permitted 15 square feet of additional gross floor area for each square foot between the street line and the building (including area of yards); provided, that the foregoing shall not apply to any area which lies further from the street line than 50% of the depth of the lot;

(.3) Buildings Constructed Back from Streets Less than Fifty Feet in Width: Where a building or any portion thereof is constructed back, at ground level, at least 10 feet from the street line of any street of less than 50 feet in width, there shall be permitted 15 square feet of additional gross floor area for each square foot between the street line and the building (including areas of yards); provided, that the foregoing shall not apply to any area which lies further from the street line than 50% of the depth of the lot;[46]

(.4) Buildings Constructed Away from Rear Lot Line, Not a Street Line: Where a building or any portion thereof is constructed away, at ground level, from a rear lot line not a street line, there shall be permitted 10 square feet of additional gross floor area for each square foot between the rear lot line and the building (including areas of yards); provided, that the foregoing shall not apply to any area which lies further from the rear lot line than 50% of the depth of the lot;

(.5) Buildings Constructed With Open Arcades: Where a building or any portion thereof is constructed so that at the ground level there is an open arcade of at least 10 feet in unobstructed width which abuts the sidewalk and is open to public use at all times, there shall be permitted 7.5 square feet of additional gross floor area for each square foot in said arcade; provided, that this subparagraph shall also apply to buildings cantilevered to produce an effect similar to an arcade at least 10 feet in unobstructed width;

(.6) Open Areas Separated from a Street Line by an Open Arcade: Where a building or any portion thereof is constructed back, at ground level, at least 10 feet from a street line, to create a continuous open area which is separated from the street line only by an open arcade, there shall be permitted 15 square feet of additional gross floor area for each square foot of such open area where said street line is of a street which is 50 feet or more in width, or 10 square foot of additional gross floor area for each square foot of such open area where said street line is of a street which is less than 50 feet in width, subject to the following provisions:

(.a) The foregoing shall not apply to any area which lies further from the street line than 50% of the depth of the lot;

(.b) "Continuous open area" as used in this subparagraph, shall mean an open area which is unobstructed (except for passage through the open arcade) in a straight line from the building to the street line;

(.c) The additional gross floor area permitted for the area within said open arcade itself shall in all cases be governed by subparagraph (.5) above;

(.7) Other Open Areas Provided at Ground Level: Where a building or any portion thereof is constructed so as to provide open areas at ground level other than those described in subparagraphs (.2) through (.6) above and not adjacent to a street line, there shall be permitted 5 square feet of additional gross floor area for each square foot of said open area;

(.8) Buildings Constructed Away from any Lot Line Above Ground Level: Where a building or any portion thereof is constructed away from any lot line (whether or not said lot line is also a street line) at any height above ground level but not higher than 40 feet, there shall be permitted 5 square feet of additional gross floor area for each square foot between the lot line and the building, provided, that where a building or any portion thereof is constructed away from a lot line at successive distances at different levels, the computation of permitted additional gross floor area shall be made for each level, beginning at the ground level, and not including, in each case, areas between the building and the lot line which have already been used in computing permitted additional gross floor area at another level;

(.9) Areas Used or Intended to be Used for Parking: Any area used or intended to be used for parking purposes shall not be included as permitting additional gross floor area under the provisions of subparagraphs (.5) and (.6) above.

(5) Off-street Parking. [See § 14-1400 of this Title.] Off-street parking shall be provided as required in the "RC-1" Residential District.

(6) Off-street Loading. Off-street loading shall be provided for that portion of any building erected which is used for commercial uses listed in this district. Said loading shall be in accordance with Section 14-1405 of this Title.