Only one main building for one-family, two-family, or multiple-family use with permitted accessory buildings may be located upon a lot or unplatted tract. Every dwelling shall face or front upon a public street, other than an alley. Where a lot is used for retail, commercial, industrial purposes or a combination of such purposes or for a combination of retail and dwelling purposes, more than one main building may be located upon the lot, but only when such buildings conform to all the open space, parking, and density requirements applicable to the uses and districts and when all such main buildings face upon a public street, other than an alley. Whenever two or more main buildings or portions thereof are placed upon a single lot or tract and such buildings will not face upon a street, the buildings may be permitted when the site plan for such development is approved by the planning and zoning commission so as to comply with the normal requirements for platting. No parking area, storage area, or required open space for one building shall be computed as being the open space, yard, or area requirement for any other dwelling or use.
(1966 Code, sec. 12-34)