No building shall hereafter be erected and no existing building shall be moved, structurally altered, rebuilt, added to or enlarged except in conformity with this chapter, and no land shall be used for any purpose other than those included among the uses listed as permitted uses in each zone by this chapter and meeting the requirements set forth by the schedule appended to this chapter in accordance with Article III. No space contiguous to any building shall be encroached upon or reduced in any manner except in conformity to the yard, lot area, building location, density, off-street parking and other regulations contained in the schedule in Article III and the text of this chapter as they apply to the zone in which the building or use 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.