No open space contiguous to any building shall be encroached upon or reduced in any manner except in conformity to the yard, lot, lot area, building location, percentage of lot coverage, off-street parking space, and such other regulations designated elsewhere in this Chapter for the zone for which the building or space is located. In the event of any such unlawful encroachment or reduction, such building shall be deemed to be in violation of the provisions of this Chapter and the certificate of occupancy for such building shall become null and void.