Construction. The provisions of this chapter shall not prevent the construction of a structure or the establishment of a use on any nonconforming lot. All the requirements of this chapter shall be met with the exception of lot area and lot width; provided, however, that if, as a result of the nonconformance of the lot area or lot width, the setbacks required in the district in which the property is located cannot be met, then the setbacks which are nonconforming may be modified to the least modification necessary to use the lot for a purpose permitted in that district, subject to the approval of the Zoning Officer. In the event that the lot owner is dissatisfied with the determination of the Zoning Officer, then the lot owner may seek a variance with the Zoning Hearing Board as provided in this chapter. However, this provision shall not apply to any two or more contiguous lots in single and common ownership as of, or subsequent to, January 27, 1996, where reparceling or replanning could create one or more conforming lot(s).