Except as hereinafter provided, no land, building, structure or premises shall hereafter be used, and no building or part thereof or other structure shall be located, erected, reconstructed, extended, enlarged, converted, altered or moved except in conformity with the regulations herein specified for the district in which it is located. No yard space or minimum area for a building or use shall be considered as any part of the yard space or minimum area for another building or use.