2006 New York Code - Lighting And Ventilation Of Rooms.

 
    § 103. Lighting and ventilation of rooms. 1. Except as in this section
  and  in  sections one hundred five, one hundred seventy-one and articles
  three and four otherwise expressly provided,  every  living  room  shall
  have  at  least one window opening directly upon a street, yard or court
  upon the same lot as that occupied by the dwelling in which such room is
  situated.
    2. Nothing in this section  shall  be  construed  as  prohibiting  the
  windows  of  any  room  from  opening  on  a  partially-enclosed terrace
  provided such terrace opens directly to a street, yard or court and  the
  area  of  the  front of the terrace which is open to the outer air is at
  least equal to seventy-five per centum of the floor surface area of  the
  terrace.
    3.  No  required window shall open upon any offset or recess less than
  six feet in  width  except  a  window  of  a  water-closet  compartment,
  bathroom, or stair or of a kitchenette.
    4.  The  total  window  area  in  every  living room shall be at least
  one-tenth of the floor surface area of such room.