(a) Room sizes. Every dwelling unit shall contain at least the minimum room size in each habitable room as required by the State Residential Building Code.
(1) Every dwelling unit shall contain at least one hundred and fifty (150) square feet of habitable floor area for the first occupant, at least one hundred (100) square feet of additional habitable area for each of the next three occupants, and at least seventy-five (75) square feet of additional habitable floor area for each additional occupant.
(2) In every dwelling unit and in every rooming unit, every room occupied for sleeping purposes by one occupant shall contain at least seventy (70) square feet of floor area, and every room occupied for sleeping purposes by more than one occupant shall contain at least fifty (50) square feet of floor area for each occupant twelve (12) years of age and over and at least thirty-five (35) square feet of floor area for each occupant under twelve (12) years of age.
(b) Ceiling height. At least one-half (½) of the floor area of every habitable room shall have a ceiling height of not less than seven feet and six inches (7'6").
(c) Floor area calculation. Floor area shall be calculated on the basis of habitable room area. However, closet area and wall area within the dwelling unit may count for not more than ten percent (10%) of the required habitable floor area. The floor area of any part of any room where the ceiling height is less than four and one-half (4'6") shall not be considered as part of the floor area for the purpose of determining maximum permissible occupancy.
(d) Cellar. No cellar shall be used for living purposes.
(e) Basements. No basement shall be used for living purposes unless:
(1) The floor and walls are substantially watertight;
(2) The total window area, total operable window area and ceiling height are equal to those required for habitable rooms;
(3) The required minimum window area of every habitable room is entirely above the grade adjoining such window area, except where the window or windows face a stairwell, window well or accessway. (Ord. of 10/5/87)