No cellar space shall be used as a habitable room or dwelling unit. No room in any basement shall be occupied as a habitable room except as a workroom or recreation room unless:
(a) The clear inner ceiling height is at least seven feet six inches;
(b) The uppermost three feet of the required clear inner height is above the average outside ground level;
(c) The required minimum window area is located entirely above the grade of the ground adjoining such window area;
(d) The floors and walls are waterproof and dampproof in accordance with an approved method; and
(e) There is a safe and unobstructed means of egress.
(Ord. 6873/68. Passed 2-5-68.)