A. A nonconforming use or structure may not be altered, enlarged, increased or extended to occupy a greater area of land or space than was occupied at the effective date of these provisions, except as provided in subsection B. or C. of this section. No additional structure or building shall be constructed on the lot in connection with such nonconforming use of land.

B. For purposes of this section, enlargement or alteration of a nonconforming use or structure shall not include making repairs when such repairs are necessary to make the structure habitable or safe for occupancy; such as replacement of non-bearing walls, fixtures, plumbing, or to strengthen or restore to a safe condition a building that has been declared to be unsafe. Further, enlargement or alteration shall not include paving, landscaping and signage improvements to the site of a nonconforming use.

C. A structure conforming as to use but nonconforming as to height, setback, coverage or other zone standards may be altered or extended, providing alteration or extension does not increase the deviation and brings the structure into conformity with the requirement.