The lawful use of a building or premises existing at the time of the effective date hereof may be continued although such use does not conform with the provisions of this chapter, and such building may be reconstructed or structurally altered and the nonconforming use therein changed according to the following regulations:
A. 
The order of classification of uses from highest to lowest for the purposes of this section shall be as set forth in § 285-3 of this chapter.
B. 
A nonconforming use may be changed to a use of a higher, or more restricted, classification but not to a use of lower, or less restricted, classification except that no residential uses shall be permitted in B-1, M-1, or M-2 Districts.
C. 
A nonconforming use shall not be extended, but the extension of a use to any portion of a building, which portion is at the time of the effective date hereof primarily arranged or designated for such nonconforming use, shall not be deemed to be an extension of a nonconforming use.
D. 
The remodeling involving structural alterations made in a nonconforming building shall not, during its life, exceed 50% of its assessed value, nor shall the building be enlarged, unless the use therein is permanently changed to a conforming use.
[Amended at time of adoption of Code (see Ch. 1, General Provisions, Art. I)]
E. 
If the nonconforming use of a building is discontinued for a period of three months, any future use of the building or premises shall conform to the regulations for the district in which it is located.
F. 
Pursuant to § 62.23(7)(hc), Wis. Stats., and notwithstanding any other provision 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 to, or replaced at, the size, location, and use that it had immediately before the damage or destruction occurred, and no limits may be imposed on the costs of the repair, reconstruction, or improvement of said structure. The size of the structure may be larger than the size it was immediately before the damage or destruction if necessary for the structure to comply with applicable state or federal requirements.
[Added at time of adoption of Code (see Ch. 1, General Provisions, Art. I)]