General. No building shall hereafter be erected and no existing building shall be moved, structurally altered, rebuilt, added to or enlarged, unless it shall conform to the requirements of this chapter. No land shall be used for any purpose other than for a permitted use under this chapter and in conformity with the requirements of the Schedule of Uses and Requirements. No yard or other required open space contiguous to any building shall be encroached upon or reduced in any manner, except in conformity to the setbacks, lot area, building location, percentage of lot coverage, off-street parking space and all other regulations designated in the said Schedule and this chapter for the district in which it is located. Any unlawful encroachment or reduction shall constitute a violation of this chapter, and any building permit, use permit and any other permit granted therefor shall, upon determination of such violation, be void.