A. 
The maximum number of occupants permitted in any unit shall be determined as follows:
[Amended 10-11-1976 by L.L. No. 32-1976; 4-26-1993 by L.L. No. 5-1993; 6-26-1995 by L.L. No. 11-1995; 5-29-2007 by L.L. No. 9-2007; 12-10-2007 by L.L. No. 16-2007]
(1) 
In any rooming or dwelling unit, the maximum number of occupants permitted in any one bedroom shall be determined as follows: one occupant per bedroom having a floor area of at least 80 square feet but less than 120 square feet; two occupants per bedroom having a floor area of at least 120 square feet but less than 180 square feet; and three occupants per bedroom having a floor area of 180 square feet or more. Where more than three persons occupy any room used for sleeping purposes, the required floor area shall be increased at the rate of 60 square feet for each occupant in excess of three.
(2) 
It shall be an offense for an owner, operator, renter, manager or other person in charge or in control of any rooming or dwelling unit to allow occupancy in excess of the provisions hereof.
(3) 
It shall be a separate offense for an owner, operator, renter, manager or other person in charge of any rooming or dwelling unit to convert any room into a bedroom without the written permission of the Building Inspector.
B. 
The maximum number of occupants in buildings occupied as clubs, dormitories or sorority or fraternity houses and providing sleeping accommodations for more than five persons shall be no more than one occupant per 50 square feet of any habitable room, other than a kitchen.
No kitchen, nonhabitable space or public space shall be used for sleeping purposes. No cellar space shall be used or occupied as habitable space.
No space shall be considered to be habitable space unless it complies with the following size requirements:
A. 
The minimum ceiling height shall be seven feet six inches over 50% of the floor area. For the purpose of computing the floor area, no such area shall be taken into account over which the ceiling height is less than five feet.
B. 
Each dwelling unit shall contain at least one habitable room having a minimum floor area of 150 square feet and a minimum horizontal dimension of 10 feet.
C. 
Kitchens shall have a minimum floor area of 60 square feet, and other habitable spaces shall contain not less than 80 square feet of floor area and shall have a minimum horizontal dimension of seven feet.
D. 
Every alcove less than 60 feet square in area, except a cooking space or foyer, shall be deemed to be part of a habitable room. The area of the opening in the dividing partition between the alcove and the room shall be at least 80% of the wall area of such partition, measured on the alcove side, but not less than 40 square feet. The depth of such alcove shall not exceed half its width. The floor area of the alcove shall be added to the floor area of the room in determining light and ventilation requirements for the room. An alcove with an area of 60 square feet or more, but less than the required area of a habitable room, shall be separately lighted and ventilated as required for habitable space.
Basements shall not be deemed habitable space where required windows are located only on one wall and the depth of the basement space exceeds four times its clear height.