A.    The lawful use of land for storage purposes, except for agriculture uses or where such use is an adjunct of any structure, and advertising signs and bulletin boards which do not conform to the provisions of this title shall be discontinued within one year from the date of the approval of this zoning code, and the lawful use of land for storage purposes, except for agriculture uses or where such use is an adjunct of any structure, and signs and bulletin boards which become nonconforming by reason of a subsequent change in this title shall also be discontinued within one year from the date of the change.

    B.    The lawful use of a building or structure existing at the time of the effective date of this zoning code may be continued, although such use does not conform to the provisions of this title. If no structural alterations are made, a nonconforming use of a building may be changed to another nonconforming use of the same or of a more restricted classification. Whenever such noncon-forming use has been changed to a more restricted use or to a conforming use, such use shall not thereafter be changed to a less restricted use.

    C.    Whenever the lawful use of a building becomes nonconforming through a change in zoning requirements or district boundaries, such use may be continued and if no structural alterations are made, may be changed to another nonconforming use of the same or of a more restricted classification. Whenever such nonconforming use has been changed to a more restricted use or to a conforming use, such use shall not thereafter be changed to a less restricted use.

    D.    The lawful use of land as a trailer court which does not conform to the provisions of this title shall not be extended beyond the area actually so used at the date of approval of this zoning code and no new parking spaces or berths for additional trailers shall be added thereto.

    E.    Whenever a nonconforming use of a nonagricultural building or structure, or part thereof, has been discontinued for a period of twelve (12) consecutive months, or for a continuous period of eighteen (18) months if the building was originally designed and constructed for a nonresidential use, such use shall not, after being discontinued or abandoned, be re-established, and the use of the premises thereafter shall be in conformity with the regulations of the district.

    F.    Where no enclosed building is involved, discontinuance of a nonconforming use for a period of six months shall constitute abandonment.

    G.    No nonagricultural building or structure housing devoted to a nonconforming use may be enlarged, extended, reconstructed or structurally altered, unless such structural alteration are required by law; except that, a building devoted to a residential nonconforming use may be reconstructed or structurally altered provided no reconstruction or structural alteration are made which increase the number of dwelling units located therein or the external size of the building (i.e., original building’ s footprint).

    H.    A residential building, in use as a single-family residence within a residential zoning district, located on a lot created and recorded prior to the enactment or an amendment of this zoning code, may continue to be used as a single-family residence and may be enlarged, extended, reconstructed, or structurally altered provided the same conforms to all setback, open yard space and height requirements of this zoning code. If such residential building is partially or totally destroyed by fire, explosion, tornado, earthquake or other casualty or act of God, it may be restored to its original condition or replaced. If replaced, it will be reconstructed to its original condition or such replacement building shall meet all setback, yard space and height requirements of the zoning code.

    I.    Any nonagricultural building or structure containing a nonconforming use, other than a one-family dwelling use, which is damaged by explosion, fire, flood, wind or other act of God to the extent of fifty (50) percent or more of its fair market value immediately prior to damage, shall not be repaired or reconstructed except in conformity with the provisions of this title. In the event that the building inspector’ s estimate of the extent of damage or fair market value is not acceptable to the applicant for the building permit to repair or reconstruct such building or structure, the applicant may appeal to the board of appeals.

    J.    No nonagricultural building or structure designed or intended to be utilized for a nonconforming use shall be constructed or allowed unless substantial construction is underway at the time of the enactment or subsequent amendment of this title and is being diligently prosecuted so that such building or structure will be completed within eighteen (18) months from the time of the enactment or subsequent amendment of this zoning code. All outstanding building permits for construction which do not meet these requirements shall be rendered null and void by the enactment or subsequent amendment of this zoning code.

    K.    No junk or automobile wrecking yard not within an S-3 flood plain and drainageway district shall be operated or maintained for more than thirty-six (36) months after the effective date of this zoning code, or after a zoning change to a use district within which such use is not permitted, except that if within an A-1 agriculture district, the board of appeals may permit for a specified time, the continued use of an area containing junk or automobile wrecking yard; provided, that an eight-foot high solid fence or wall, or a ten-foot wide planting strip of trees and shrubs to provided a dense screen at maturity enclose such area.

    L.    Any unimproved lot on which no building or structure was erected prior to the enactment or an amendment of this section, and which does not meet the minimum size and/or dimension requirements of the zoning district in which it is located shall be considered a nonconforming lot of record and may be conveyed or sold, the same as if it were a conforming lot, but no building or structure shall be constructed or erected thereon unless the owner first obtains a variance from the city council to allow for the same. Any lot on which a building or structure was erected prior to the enactment or an amendment of this section, and which does not meet the minimum size and/or dimension requirements of the zoning district in which it is located shall be considered a legal nonconforming lot of record and may be used, conveyed or sold the same as if it were a conforming lot. (Ord. 1716 § 1, 1999: prior code § 40-11-1)