Only that portion of the land or water in actual use may be so continued, and the structure may not be extended, enlarged, reconstructed, substituted, moved, or structurally altered except when required to do so by law or order so as to comply with the provisions of this chapter.

Total lifetime structural repairs or alterations shall not exceed 50% of the Town's equalized value of the structure at the time of its becoming a nonconforming use, unless it is permanently changed to conform to the use provisions of this chapter.

Substitution of new equipment may be permitted by the Board of Appeals if such equipment will reduce the incompatibility of the nonconforming use with the neighboring uses.

If such nonconforming use is discontinued or terminated for a period of 12 months, any future use of the structure, land, or water shall conform to the provisions of this chapter.

When a nonconforming use is damaged by fire, explosion, flood, the public enemy, or other calamity, to the extent of more than 50% of its current equalized assessed value, it shall not be restored except so as to comply with the use provisions of this chapter.

Additions and enlargements to, or the moving of, existing nonconforming structures are permitted and shall conform to all established building setback lines and the yard, height, parking, loading, and access provisions of this chapter. Existing nonconforming structures and their additions shall not be permitted to encroach further upon established yard and height requirements than the existing encroachment. The provisions of this subsection with respect to additions or enlargements are applicable only if the lot or parcel conforms to the requirements of the County Sanitary Ordinance or is serviced by a public sanitary sewer.

Existing nonconforming structures that are damaged or destroyed by fire, explosion, flood, or other calamity may be reconstructed within their original footprint and insofar as is practical shall conform to all established building setback lines and the yard, height, parking, loading, and access provisions of this chapter. The provisions of this subsection with respect to reconstruction are applicable only if the lot or parcel conforms to the requirements of the County Sanitary Ordinance or is serviced by public sanitary sewer. A nonconforming structure or any structure with a nonconforming use which is damaged or destroyed by violent wind, vandalism, fire, flood, ice, snow, mold or infestation may be restored in accordance with the provisions of § 62.23(7)(hc), Wis. Stats.

The repair, maintenance, renovation, rebuilding or remodeling of a nonconforming structure or any part thereof within its existing footprint is permitted in accordance with the provisions of § 60.61 (5e)(b), Wis. Stats.