No person shall occupy as owner, occupant or permit to be occupied by another, any dwelling or dwelling unit which does not comply with the following requirements:
A. 
Floor Space Per Person. Every dwelling unit shall contain at least one hundred fifty (150) square feet of floor space for the first occupant thereof, and at least one hundred thirty (130) square feet of floor space for every additional occupant thereof, the floor space to be calculated on the basis of total habitable room space; except, that any dwelling unit which is occupied by two or more occupants and which contains a room not intended to be used primarily for cooking or sleeping but which is properly designed and equipped or especially furnished with either an efficiency closet or wall-type kitchen unit or kitchenette, or bed furniture properly designed for daytime storage or other daytime uses so as to be usable for a combination of regular living and efficiency sleeping space may contain one hundred (100) square feet less floor space than would otherwise be required. In every case the floor space shall be calculated on the basis of total habitable room area.
B. 
Sleeping Space Per Person. In every dwelling unit of two or more rooms, every room occupied for sleeping purposes by one occupant shall contain at least seventy (70) square feet of floor space, and every room occupied for sleeping purposes by more than one person shall contain at least forty (40) square feet of floor space for each occupant thereof.
C. 
Ceiling Height. At least one-half of the floor area of every habitable room shall have a ceiling height of at least seven feet; and the floor area of that part of any room where the ceiling height is less than five feet shall not be considered as part of the floor area in computing the total floor area of the room for the purpose of determining the maximum permissible occupancy thereof.
D. 
Cellar and Basement Occupancy. No basement space shall be used as a habitable room or dwelling unit, except as a workshop or recreation room, unless:
1. 
The floor and walls are impervious to leakage of underground and surface runoff water and are insulated against dampness;
2. 
The total window area in each room is equal to at least the minimum window area sizes as required in subsection (A) of Section 15.12.720 and which is located above the finished grade of the adjoining ground of the window wall and unless it shall comply with the provisions of subsection (B) of Section 15.12.720 when an approved ventilating system is supplied.
In no case, however, shall cellar space be used for sleeping purposes.
E. 
Means of Egress. Every dwelling unit above the first floor shall have approved dual means of egress, with minimum head room of six feet, six inches, leading to safe and open space at ground level. Every dwelling unit in a multiple dwelling shall have immediate access to two or more approved means of egress one of which will have a minimum head room of six feet, six inches, leading to safe and open space at ground level, or as required by the laws of this state and the appropriate authority.
(Prior code § 14-69)