A. Expansion – A nonconforming structure may not be changed, altered, replaced, added to or expanded in any manner, except as provided in subsection B of this section and unless such change or alteration does not increase the degree of nonconformity or would bring the structure into conformity with provisions of the zoning code.

B. Repair – Such repair and maintenance work as required to keep the structure in sound condition may be made, provided no structural alterations shall be made except such as are required by law or ordinance or authorized by the planning director. In case damage or destruction by fire or other causes requiring expenditures for repair in excess of one-half of the assessed value as shown on the county assessor’s records immediately prior to destruction, the structure or structures, other than residential dwellings, shall not be rebuilt unless they conform to all requirements of the zoning code. Permits to repair the damage must be applied for within one year and construction must be completed within two years of the damage occurring or the legal nonconforming status will be lost.

C. Any nonconforming structures shall be maintained in usable condition or the nonconforming status shall be lost.