New York Consolidated Laws, Multiple Dwelling Law - MDW § 214. Size of rooms

a. In each apartment there shall be at least one living room containing at least one hundred twenty square feet of clear floor area, and every other living room except a kitchen shall contain at least seventy square feet of clear floor area.

b. Every living room which contains less than eighty square feet of clear floor area or which is located in the cellar or basement shall be at least nine feet high, and every other living room at least eight feet high;  these measurements to be taken from finished floor to finished ceiling.

c. Every living room shall have a least horizontal dimension of at least six feet and, if the tenement was erected after April eighteenth, nineteen hundred twelve, of at least seven feet;  except that the minimum horizontal dimension of any kitchen and of a maid's or servant's sleeping room in a fire-proof tenement in which one or more passenger elevators are operated, shall be six feet.