Situations may occur where a legally existing lot, structure, or use does not conform to the requirements contained in this chapter. The purpose of this chapter is to establish regulations governing nonconforming lots, structures, and uses and, further, to:
A. 
Allow nonconforming lots to be used for single-family dwellings and accessory structures.
B. 
To permit nonconformities to continue until removed or corrected but not to encourage the continuance of the nonconformity.
A nonconforming use of land or structure which legally existed at the time of adoption or amendment of this chapter may be continued subject to the following provisions:
A. 
Change in tenancy, ownership, or management. The tenancy, ownership or management of a nonconforming use may be changed, provided that the nonconforming use is not enlarged or changed to a more intensive use.
B. 
Change or substitution of use. A nonconforming use may be changed to a conforming use or the Plan Commission may permit a nonconforming use to be changed to a less intensive nonconforming use. Once the change has been effected, the use shall not revert back to the prior nonconforming use.
C. 
Enlargement. A nonconforming use shall not be enlarged, increased, or extended to occupy a greater area of land or structure than was occupied as of the effective date of this chapter.
D. 
Relocation. A nonconforming use shall not be moved in whole or in part to any other portion of the lot or structure than was occupied as of the effective date of this chapter.
E. 
Discontinuance. A nonconforming use which has been discontinued for a period of 12 months shall not be reestablished, and any future use of the land or primary structure shall conform to the provisions of this chapter.
F. 
Damage or destruction. A primary structure containing a nonconforming use which is damaged by fire, explosion, flood, accident, or other causes to the extent of more than 50% of its equalized assessed value shall not be restored or rebuilt except in conformance with the provisions of this chapter. Accessory structures may be restored or rebuilt provided the primary structure containing a nonconforming use is not damage or destroyed as described above and provided the accessory structure meets all aspects of the municipal Code.
G. 
Establishment of nonconforming status. The burden of proof that a legally permitted nonconforming use existed at the time of the adoption of this chapter shall be the responsibility of the property owner.
Nonconforming structures are buildings and structures that do not meet the setback, height, or other dimensional or density requirements of this chapter for permitted uses in the zoning district in which they are located. A nonconforming structure may be maintained and repaired, subject to the provisions of this section.
A. 
Repairs and maintenance. Repairs and maintenance may be made to a nonconforming structure. Ordinary repairs and maintenance include internal and external painting; decorating; paneling; the replacement of doors, windows, and other nonstructural components; and the maintenance, repair, or replacement of existing private sewage and water supply systems or connections to public utilities. For the purpose of this section, repairs shall include the replacement of storage tanks where the safety of operation of the installation requires such replacement and other replacements of or substitutions for machinery or equipment not involving structural alterations to the building or structure.
B. 
Additions or expansion. Additions or expansions may be made to a nonconforming structure provided that such additions or expansions do not increase the degree of nonconformity of the structure and only in compliance with the following requirements:
(1) 
All applicable setback requirements of this chapter shall be met.
(2) 
All applicable parking and loading requirements for the use occupying the structure's addition or expansion shall be met.
(3) 
The process of adding onto a legally existing nonconforming structure shall not be used to effectuate replacement of that structure where replacement would not otherwise be allowed under the provisions of this chapter.
(4) 
An addition may be made to a nonconforming structure only if the legally existing structure is in sound condition.
(5) 
The addition or multiple additions shall not surround or encase the legally existing structure in such a way as to replace that structure.
C. 
Relocation. A nonconforming structure may be moved in whole or in part to any other location on the same or any other lot, only in compliance with all of the regulations of the district in which it is to be relocated.
D. 
Damage or destruction. A nonconforming structure which is damaged by fire, explosion, flood, accident, or other causes to the extent of more than 50% of its equalized assessed value shall not be restored or rebuilt except in conformance with the provisions of this chapter. A structure which is damaged by 50% or less of its equalized assessed value may be repaired or reconstructed and used as before the time of damage, provided that such reconstruction is started within one year from the date of damage and diligently pursued to completion.
A lot which does not comply with lot width or lot area requirements may nonetheless be used for a permitted use, provided that:
A. 
The lot has been legally created.
B. 
The lot is in separate ownership from abutting lands. If abutting lands are under the same ownership as the nonconforming lot, the contiguous parcels shall be replatted to meet minimum lot area and lot width requirements.
C. 
All structures comply with the setback, lot coverage, height, parking, access, and other requirements of the district insofar as practical, subject to the approval of the Zoning Administrator or, if appealed, the Zoning Board of Appeals.
If a use, whether permitted, conditional, or nonconforming, has nonconforming characteristics, including parking, lighting, noise, and other matters, the use shall not be expanded until the nonconforming characteristics are brought into conformance with the provisions of this chapter.