No main building shall be distant less than twenty (20) feet from any other main building.

    Where an accessory building or a space designed or used for the parking of a motor vehicle occupies any part of the area between the two dwellings on the same building site, such occupied space shall not be included in the calculation of the required minimum distance between them. No parking space shall in any event be situated less than four feet from the wall of any dwelling, except when within the dwelling or within an attached carport or garage. (Prior gen. code § 8-28.10)