35-50 Modification of Yard Regulations
In mixed buildings with differing yard or rear yard equivalent requirements for different uses, the applicable residential yard and rear yard equivalent regulations shall apply at the lowest story containing dwelling units with windows facing onto such residential yard or rear yard equivalent, as applicable.
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In the districts indicated, no front yard shall be required, except that the provisions of paragraph (a) of Section 34-233 (Special provisions applying along district boundaries) shall apply to portions of a zoning lot within 25 feet of a Commercial District boundary which coincides with a side lot line of a zoning lot in an R1 through R5 District.
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In the districts indicated, except as otherwise provided in Section 35-54 (Special Provisions Applying Adjacent to R1 Through R5 Districts), no side yard shall be required although, if any open area extending along a side lot line is provided at any level, it shall have a width of not less than eight feet. Permitted obstructions, pursuant to paragraph (a) of Section 33-23 (Permitted Obstructions in Required Yards or Rear Yard Equivalents), shall be permitted in such open areas.
However, in C3A Districts, side yards shall be provided in accordance with the regulations for R3A Districts as set forth in Section 23-461 (Side yards for single- or two-family residences).
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In the districts indicated, for a residential portion of a mixed building, the required residential rear yard shall be provided at the floor level of the lowest story used for dwelling units or rooming units, where any window of such dwelling units or rooming units faces onto such rear yard. If the level of such yard is at or higher than the first story, decks, parapet walls, roof thickness, solar energy systems up to four feet high, vegetated roofs, and weirs, shall be permitted, pursuant to Section 23-62 (Permitted Obstructions).
In C4-4L Districts, for through lots that have a maximum depth of 180 feet or less and are bounded by a street containing an elevated rail line, no residential rear yard equivalent shall be required.
A portion of a building used for residential uses other than dwelling units in Quality Housing buildings containing affordable independent residences for seniors on zoning lots meeting the criteria set forth in paragraph (a)(4) of Section 23-664 (Modified height and setback regulations for certain Inclusionary Housing buildings or affordable independent residences for seniors) shall be a permitted obstruction within a rear yard or rear yard equivalent on zoning lots in C1 or C2 Districts mapped within R6 through R10 Districts, other than R6B, R7B or R8B Districts, or in Commercial Districts with a residential equivalent of an R6 through R10 District, other than R6B, R7B or R8B Districts, provided that the height of such building portion does not exceed one story, or 15 feet above the adjoining grade, whichever is less, and provided that such space shall be accessible to all residents of the building.
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In the districts indicated, on zoning lots adjacent to zoning lots in R1, R2, R3, R4 or R5 Districts, a side yard at least eight feet wide shall be provided along the entire length of the common side lot line. Such side yard may be used for accessory parking.