NY Mult Dwell L § 31 (2021)
2021 New York Laws MDW - Multiple Dwelling Article 3 - Multiple Dwellings--General Provisions Title 1 - Light and Air 31 - Size of Rooms.

§  31.  Size  of  rooms.  1.  The  provisions  of this section, except   subdivision six, shall apply only to multiple  dwellings  erected  after   April  eighteenth,  nineteen hundred twenty-nine, and shall apply to all   such dwellings unless otherwise expressly limited.2. Except as in this section and  in  section  thirty-three  otherwise   expressly  provided,  rooms,  except kitchens, water-closet compartments   and bathrooms, shall meet the following minimum requirements as to size:a. In each apartment in a class A multiple dwelling there shall be  at   least  one living room containing at least one hundred thirty-two square   feet of floor area.b. Every living room, except as provided in paragraph e, shall contain   at least eighty square feet of floor space.c. Every room shall be at least eight feet high, the  measurements  to   be  taken  from  the  finished  floor  to  the finished underside of the   ceiling beams except that as many as four beams crossing the ceiling  of   any  basement  room  may  be  disregarded if none of them exceeds twelve   inches in width or extends below the ceiling more than six inches.d. Every living room shall  be  at  least  eight  feet  in  its  least   horizontal  dimension, except as provided in paragraph e and except that   any number of bedrooms up  to  one-half  of  the  total  number  in  any   apartment  containing three or more bedrooms may have a least horizontal   dimension of seven feet or more.e. A one-room apartment in a class B multiple dwelling may be as small   as sixty square feet in its  floor  area  and  six  feet  in  its  least   dimension.3.  The  requirements  of  this  section  with  respect  to  the least   horizontal dimension  and  the  minimum  area  of  rooms  shall  not  be   applicable to any room in a fireproof class B multiple dwelling occupied   as  a  lodging  house in which every apartment, other than one apartment   occupied exclusively by a person or persons engaged in  the  maintenance   or  supervision  of  such multiple dwelling, consists of one room and in   which every such room opens directly upon a public hall.4. Dining bays with a floor area of fifty-five  square  feet  or  less   shall not be considered as rooms or alcoves and shall not be required to   comply  with the provisions of section thirty-two. Every such dining bay   shall be equipped with such appropriate permanent  fittings  as  may  be   required  by  the  department  and  shall  be provided with at least one   window opening directly upon a street or upon a lawful  yard,  court  or   space  above  a  setback.  Such  window  shall  have an area of at least   one-eighth of the floor area of such dining bay.5. A portion of any  apartment  used  as  an  entrance  hall  to  such   apartment  may  be  designated  as  a  foyer.  Such a foyer shall not be   considered a room if the department shall so permit and if eithera. Its floor area does not exceed ten per centum of  the  total  floor   area of such apartment, orb.  Every  room in such apartment exceeds in area the minimum required   area of such room by more than twenty per centum and the floor  area  of   such  foyer  does not exceed twenty per centum of the floor area of such   apartment.6. a. Exept in class B dwellings and dormitories,  no  room  shall  be   occupied  for  sleeping  purposes  by  more than two adults, considering   children of twelve years of age or  more  as  adults  and  two  children   between  the ages of two and eleven years inclusive as the equivalent of   one adult. Children under two years of age need  not  be  considered  as   occupants.  No  room  shall have sleeping accomodations for more persons   than can be accommodated in  conformity  with  the  provisions  of  this   subdivision. b. Every room in every dwelling, whenever erected, shall have at least   four  hundred  cubic  feet  of air for each adult, and two hundred cubic   feet of air for each child  occupying  such  room.  Except  in  class  B   dwellings,  dormitories  and except as otherwise provided in subdivision   two  of  section  thirty-one  or  in  section  thirty-four for dwellings   erected after April eighteenth, nineteen  hundred  twenty-nine,  and  in   sections  one hundred seventy-four, two hundred fourteen and two hundred   sixteen, every living room shall (1) contain sixty square feet  or  more   of floor space, (2) be at least six feet wide at its narrowest part, (3)   if  a  sleeping  room, contain seventy-five square feet or more of floor   space and (4) if less than seventy-five square feet in floor area, shall   not be occupied by more than one adult.