No nonconforming use shall be enlarged, extended, reconstructed, or structurally altered, except as follows:
(A) The Board may permit, on a once-only basis, a building containing a nonconforming use to be enlarged to an extent not exceeding 20% of the ground floor area of the existing building or structure devoted to a nonconforming use at the time of enactment of this chapter or at the time of its amendment making the use non-conforming. The Board shall not authorize an extension which would result in a violation of the provision of this chapter with respect to any adjoining premises, or which would occupy ground space required for meeting the yard or other requirements of this chapter.
(B) No nonconforming building or structure shall be moved in whole or in part to any other location unless such building or structure and the yard and other open spaces provided are made to conform to all of the regulations of the district in which such building or structure is to be located.
(C) Any residential structure which is nonconforming due to the fact of its being in a non- residential zoning district may be enlarged, extended, reconstructed or structurally altered provided it meets the requirements of the adjacent or most proximate R-District.
(Ord. 34-90, passed 12-26-90)