A. Accessory buildings may be built in a required rear yard but such accessory buildings shall not be nearer than ten feet to the main buildings, nor shall any such accessory building occupy more than thirty percent of the rear yard.
B. Accessory buildings which are to be used for storage purposes only may be erected upon a lot prior to the construction of the main building, but no accessory building shall be used for a dwelling purpose except by domestic servants employed on the premises. (Prior code § 11-3-7 (a) (4, 5))