The text
Group dwellings shall be considered as one building for the purpose of front, side and rear yard requirements, the entire group as a unit requiring one front, one rear and two (2) side yards as specified for dwelling structures. The minimum distance between structures shall be ten feet (10') for single-story buildings, fifteen feet (15') for two (2) story buildings and twenty feet (20') for three (3) or more story buildings.
(1985 Code § 19-10-1)