“Dwelling unit” means one or more rooms designed for or occupied by one family or communal residence for living or sleeping purposes and containing kitchen facilities. All rooms comprising a dwelling unit shall have access through an interior door to other parts of the dwelling unit. An efficiency apartment, also known as a studio apartment, constitutes a dwelling unit within the meaning of this title. (Ord. 6477 § 5, 2013; Ord. 6245 § 3, 2009; Ord. 4229 § 2, 1987.)