Except as herein provided, no building or structure shall be erected, converted, enlarged, reconstructed, moved or structurally altered, nor shall any building, structure or land be used, nor shall any excavation or fill be made;
(a) Except for any expressed purpose permitted in the district in which such building or structure or land is located;
(b) Except in conformance to the height and bulk limits established for the district in which such building or structure or use is located;
(c) Except in conformance to the area, frontage, and yard regulations of the district in which such building or structure or use is located; and
(d) Except in conformance to the off-street parking and off-street loading space regulations of the district in which such building or structure or use is located.