Nonconforming single- and two-family residential structures may be reconstructed, extended, altered or structurally changed upon the issuance of a building permit after a determination by the Building Commissioner that such proposed reconstruction, extension, alteration, or change does not increase the nonconforming nature of said structure. In the event that the Building Commissioner determines that the nonconforming nature of such structure would be increased by the proposed reconstruction, extension, alteration, or change, the Board of Appeals may, by special permit, allow such reconstruction, extension, alteration, or change where it determines that the proposed modification will not be substantially more detrimental than the existing nonconforming structure to the neighborhood. The following circumstances shall not be deemed to increase the nonconforming nature of said structure:
181.3351.
Alteration to a structure which complies with all current setback, yard, building coverage, and building height requirements but is located on a lot with insufficient area where the alteration will also comply with all of said current requirements.
181.3352.
Alteration to a structure which complies with all current setback, yard, building coverage, and building height requirements but is located on a lot with insufficient frontage where the alteration will also comply with all of said current requirements.
181.3353.
Alteration to a structure which encroaches upon one or more required yard or setback areas, where the alteration will comply with all current setback, yard, building coverage and building height requirements; the provisions of this subsection shall apply regardless of whether the lot complies with current area and frontage requirements.
181.3354.
Alteration to the side or face of a structure which encroaches upon a required yard or setback area, where the alteration will not encroach upon such area to a distance greater than the existing structure; the provisions of this subsection shall apply regardless of whether the lot complies with current area and frontage requirements.
181.3355.
Alteration to a nonconforming structure which will not increase the footprint of the existing structure provided that existing height restrictions shall not be exceeded.