Every dwelling unit shall contain a minimum gross floor area
of not less than 150 square feet for the first occupant, and 100 square
feet for each additional occupant. The floor area shall be calculated
on the basis of the total area of all habitable rooms.
In every dwelling unit, every room occupied for sleeping purposes
by one occupant shall have a minimum gross floor area of at least
70 square feet. Every room occupied for sleeping purposes by more
than one occupant shall contain at least 50 square feet of floor area
for each occupant thereof.
No habitable room, bathroom or water closet compartment which
is accessory to a dwelling unit shall open directly into or shall
be used in conjunction with a food store, barber or beauty shop, doctor's
or dentist's examination or treatment room, or similar room used for
public purposes.
No residence building or dwelling unit containing two or more
sleeping rooms shall have such room arrangement that access to a bathroom
or water closet compartment intended for use by occupants of more
than one sleeping room can be had only by going through another sleeping
room, nor shall the room arrangement be such that access to a sleeping
room can be had only by going through another sleeping room or a bathroom
or water closet compartment. Existing one-family dwellings where no
lodgers are occupants may be exempt from the requirement concerning
access through a first sleeping room.
No dwelling unit partially below grade shall be used for living
purposes unless:
