Once a nonconforming use or structure has been changed to conform,
it shall not revert back to a nonconforming use or structure. Once
the Zoning Board of Appeals has permitted the substitution of a more
restrictive nonconforming use for an existing nonconforming use, the
substituted use shall lose its status as a legal nonconforming use
and become subject to all the conditions required by the Zoning Board
of Appeals.
A vacant lot which does not contain sufficient area to conform
to the dimensional requirements of this chapter but which is at least
50 feet wide and 5,000 square feet in area may be used as a single-family
building site, provided that the use is permitted in the zoning district,
providing the lot is on record in the appropriate county register
of deeds office prior to the effective date or amendment of this chapter.
If two or more substandard vacant lots with continuous frontage have
the same ownership as of the effective date of this chapter, the lots
involved shall be considered to be an individual parcel for the purposes
of this chapter. If one of the substandard lots with continuous frontage
under the same ownership as of the effective date of this chapter
is an improved lot, then such lot shall nevertheless be considered
an individual parcel for the purpose of this chapter.