No person shall occupy or let to another for occupancy any dwelling or dwelling unit, for the purpose of living therein, which does not comply with the following requirements.

    A.    Every dwelling unit with the exception of a mobilehome shall contain at least one hundred square feet of floor space of the first occupant thereof and at least seventy-five square feet of floor space for every additional occupant thereof, the floor space to be calculated on the basis of total habitable room area.

    B.    In every dwelling unit of two or more rooms, every room occupied for sleeping purposes by one occupant shall contain at least seventy square feet of floor space, and every room occupied for sleeping purposes by more than one occupant shall contain at least fifty square feet of floor space for each occupant thereof.

    C.    No dwelling or dwelling unit containing two or more sleeping rooms shall have such room arrangements 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 room arrangements 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.

    D.    At least one-half of the floor area of every habitable room, except mobilehomes shall have a ceiling height of at least seven feet, the floor area of the part of any room where the ceiling height is less than five feet shall not be considered a part of the floor area in computing the total floor area of the room for the purpose of determining the maximum permissible occupancy thereof. The entire floor area of a mobilehome shall have a minimum ceiling height of at least six feet.

    E.    No cellar shall be used as a dwelling unit.

    F.    No basement shall be used as a dwelling unit unless:

    1.    The floor and wall are impervious to leakage of underground and surface runoff water and are insulated against dampness;

    2.    The total of window area in each room is equal to at least the minimum window area sizes as required in Section 15.24.090 (A).

    3.    The total of openable window area in each room is equal to at least the minimum as required under Section 15.24.090, except where there is supplied some other device affording adequate ventilation and approved by the chief code enforcement officer.

    e.    Every window which is below the grade of the ground adjoining such window shall have a lightwell or area way extending at least thirty inches out from said window the entire depth and width of the window. (Prior code § 11-20)