Each off-street parking space shall be at least nine feet wide and 19 long, except that spaces for one, two, three and four family dwellings shall be at least nine feet wide and 17 feet long. In no case, except as may be required by other statutes, ordinances and regulations respecting parking for the handicapped, shall any off-street parking space accessory to a residential use of four families or less be more than nine feet wide.