Unless otherwise specified in this chapter, not more than one principal dwelling or building shall be permitted on one lot.

No buildings or structures shall hereafter be used, erected, altered, converted, enlarged, added to, moved or reduced, wholly or in part, nor shall any land be designed, used or physically altered for any purpose or in any manner except in conformity with this chapter.

When a lot is formed from part of a lot already occupied by a building, any subdivision shall be effected in such a manner as not to impair any of the requirements of this chapter with respect to the existing building.

No open space provided around any principal building for the purpose of complying with front, side or rear yard provisions of this chapter shall be considered as providing the yard provisions for another principal building.

A twenty-foot setback shall be provided between the foundation of any building and any "critical areas", conservation easement areas and/or conservation deed restricted areas, whether existing or required.

All development shall comply with the provisions of Section 16-15, Floodplain Management Regulations and Section 16-16, Critical Areas.