The lawful nonconforming use of a structure, land, or water existing at the time of the adoption or amendment of this chapter may be continued although the use does not conform to the provisions of this chapter; however, only the portion of the land in actual use may be so continued, and the structure housing the nonconforming use may not be extended, enlarged, reconstructed, substituted, moved, or structurally altered if it extends or enlarges the nonconforming use except when required to do so by law or order or so as to comply with the provisions of this chapter.
A.
Total lifetime structural repairs or alterations to the structure housing the nonconforming use shall not exceed 50% of the assessed value of the structure at the time of its becoming nonconforming unless it is permanently changed to conform to the use provisions of this chapter.
B.
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.