Except as hereinafter provided:
A. No building shall be erected, converted, enlarged, reconstructed or structurally altered, nor shall any building or land be used except for the purpose permitted in the district in which the building or land is located.
B. No building shall be erected, converted, enlarged, reconstructed or structurally altered to exceed the height limit herein established for the district in which the building is located.
C. No building shall be erected, converted, enlarged, reconstructed or structurally altered except in conformity with the area regulations of the district in which the building is located.
D. The minimum yards and other open spaces, including lot area per family, required by this title for each and every building existing at the effective date hereof, or for any building hereafter erected, shall not be encroached upon or considered as yard or open space requirements for any other building.
E. Every building hereafter erected or structurally altered shall be located on a "lot", as defined in section 10-2-1 of this title, and in no case shall there be more than one main building on one lot unless otherwise provided in this title.
F. The front yard requirements on both streets of a corner lot shall be observed for all buildings and structures, including accessory buildings. (1982 Code § 5-2-5)