No building shall hereafter be erected or altered:
A. That will exceed the height limit, nor shall any building or land be used or occupied hereafter in excess of the density regulations for that district;
B. To accommodate a greater number of families than those specified for that district; or
C. To exceed the specifications of required lot size, maximum coverage, yard requirements, height limitations or bulk limitation for that district as defined. (1990 Code § 12-221)