(a) Erection of More Than One (1) Principal Structure on a Lot. In any zone more than one (1) principal structure housing a permitted use may be erected on a single lot; provided that, area width and all other development requirements of the zone shall be met for each principal structure as though each structure were on an individual lot except one (1) additional single-family dwelling may be permitted on the same lot provided the principal structure is a single-family dwelling, and the maximum lot coverage and setback requirements for the zone are met.

(b) Distance Between Buildings on a Lot. No detached dwelling or other main building shall be less than six feet (6') from any other detached dwelling or main building on the same building site.