Accessory Uses. Accessory uses customarily incident to the above uses shall be permitted. The term "accessory use" shall not include a business or any building or use not located on the same lot with the building to which it is accessory. Accessory uses may, however, include an office for a professional person, dressmaker, artist, teacher or musician when situated in the same dwelling used by such person as his/her dwelling. A garage or group of garages for more than four motor vehicles shall not be permitted as an accessory use. Permitted garages need not, however, be occupied by motor vehicles owned by the occupant of the premises to be considered an accessory garage.