N.Y. Multiple Dwelling Law § 28: Two or more buildings on same lot

§ 28. Two or more buildings on same lot. 1. If any separate multiple

dwelling is erected after April eighteenth, nineteen hundred

twenty-nine, upon the rear of a lot which has another multiple dwelling

on the front or upon the front of a lot which has another multiple

dwelling on the rear, access shall be provided to the rear dwelling from

a street by means of an unobstructed court at least twenty feet in

width.

2. Except as otherwise provided for motor vehicle storage space in

section sixty and for dwellings erected, enlarged, converted or altered

pursuant to plans filed prior to December fifteenth, nineteen hundred

sixty-one in accordance with the provisions of subdivision one of

section twenty-six, if any building or dwelling is placed on the rear of

the same lot with a multiple dwelling or a multiple dwelling is placed

anywhere on the same lot with another building, there shall be left

between the two buildings an open space unoccupied from the ground up

and at least forty feet in depth, measured in the direction from one

building to the other for the first one hundred twenty-five feet above

the curb level, and eighty feet above that point. The provisions of this

subdivision requiring an open space eighty feet in depth between

portions of buildings in excess of one hundred twenty-five feet above

the curb level shall not be applied when both such portions are towers.

3. If on the rear of a lot any such building or any portion thereof is

used for business purposes, a separate passageway at least three feet

six inches wide and seven feet high shall be provided leading from every

such open space adjacent to such building to a street. No such

passageway shall connect with, go through or form a part of any entrance

hall or other public hall of a multiple dwelling upon the front of the

lot.