In any zoning district in which single-family residential buildings
are permitted, a single-family residential building and associated
accessory buildings may be erected on any single lot of record existing
on the date of adoption or amendment of this chapter. Such a lot must
be in separate ownership and not of continuous frontage with other
lots in the same ownership. This provision shall apply even though
the lot fails to meet the zoning district's requirements for area
or width, or both, provided that the lot conforms to the zoning district's
setback dimensions and other requirements not involving area or width,
or both. Variance of area, width and setback requirements shall be
obtained only through action of the Zoning Hearing Board.