If any nonconforming use is discontinued or
terminated for a period of 12 months, any future use of the structure
or land shall conform to the provisions of this chapter. When a nonconforming
use or structure is damaged by fire, explosion, flood, public enemy
or other calamity, to the extent of more than 50% of its current assessed
value, it shall not be restored except so as to comply with the use
provisions of this chapter. A nonconforming structure damaged or destroyed
by violent wind, vandalism, fire, flood, ice, snow, mold or infestation
after March 2, 2006, may be restored in accordance with the provisions
of § 62.23(7)(hc), Wis. Stats.
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 restricted 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.