(A) Residential. Any lot in a single ownership in a residential district, which ownership was on record at the time of adoption of this chapter, that does not meet the requirements of this chapter for yards or other areas of open space, shall be utilized for single-family residential dwelling purposes only. The purpose of the provision is to permit utilization of recorded lots which lack adequate width or depth as long as the housing unit meets square footage requirements for the district in which the lot is located. The Board of Zoning Appeals, upon proper application and for good cause, may vary setback lines and yard depths on existing substandard lots, subject to restrictions in § 154.563.
(B) Commercial and Industrial. Only those lots which are lots of record which are presently used, or have been used, for commercial or industrial uses within an existing commercial or industrial zoning district and which ownership was on record at the time of adoption of this chapter, which do not meet the requirements of this chapter for minimum lot width at minimum building setback line, minimum lot frontage, minimum lot area, or minimum open space, may be utilized for commercial or industrial uses under conditions established by the Planning Commission. The purpose of this provision is to permit utilization of recorded lots though they may not meet minimum area requirements of the district of which they are a part; however, the Board of Zoning Appeals, under proper application, and for good cause, may vary minimum and setback requirements on existing substandard lots, subject to restrictions of § 154.563.