A.
A "group development" is any development containing:
(1)
Two or more structures containing principal land uses on the same lot.
(2)
Any single structure on a single lot which contains five or more dwelling units or two or more nonresidential uses.
(3)
Any new institutional, commercial and office buildings in excess of 5,000 gross square feet and all multibuilding group developments in which the combined total of all structures on a site, regardless of diverse ownership, use or tenancy, exceeds 5,000 square feet.
(4)
Any building additions to institutional, commercial and office buildings that bring the total building size to over 5,000 gross square feet. These regulations shall apply to the building addition, the older portions of the building constructed prior to the adoption of this article, and to the site.
B.
Common examples of group developments include six-unit apartment buildings, apartment complexes, condominium complexes, strip centers, shopping centers and office centers. (One-tenant office or commercial buildings containing less than 5,000 square feet of gross floor area, four-unit apartment buildings, and other land uses in which each nonresidential building contains only one tenant, or where the lot contains only one structure, or where each residential building contains four or fewer dwelling units, are not group developments even though such developments may contain parcels under common ownership.)