Existing uses. Any nonconforming uses or structures existing as of the date of adoption of this chapter may be continued upon the lot or in the building so occupied, and any structure may be restored or repaired in the event of partial destruction thereof.

Enlargement or expansion of nonconforming uses. No nonconforming use may be extended or expanded over a larger area than it occupied at the time of enactment of this chapter.

Conversion to permitted use. After a nonconforming building or use has been converted to a permitted use, it shall not be changed back again to a nonconforming use.

Abandonment. If a nonconforming use has been abandoned, such use shall not be recommended. Cessation of a nonconforming use for a continuous period of one year may be taken as prima facie evidence of an intent to abandon such use.

Nonconforming lots. Any lot existing as of the date of enactment of this amended subsection that is located in a residential district and fails to comply with the minimum requirements of this chapter may have a building permit issued for a new building or addition for a use permitted in the zone district in which it is located without an appeal to the Land Use Board, provided that the building height, building coverage and lot coverage requirements of the zone are not exceeded and provided that the yard requirements may be reduced by the ratio of the area of the nonconforming lot to the lot area required in the zone, except that no required yard shall be reduced to less than 50% of the requirement of the zone and except that no front or rear yard shall be reduced to less than 25 feet and no side yard shall be reduced to less than 10 feet in the R-.75 Zone and 25 feet in all other zones.