At least one water closet, lavatory basin, and bathtub or shower properly connected to an approved water and sewer system and in good working condition, shall be supplied for each four rooms within a rooming house wherever the facilities are shared. All such facilities shall be located within the residence building served and shall be directly accessible from a common hall or passageway and shall be not more than one story removed from any of the persons sharing such facilities. Every lavatory basin and bathtub or shower shall be supplied with hot and cold water at all times. Such required facilities shall not be located in a cellar. (Prior code § 17-1-58)