(a) Where a lot of record at the effective date of this Zoning Code has less area or width than required in Section 1181.01 and the owner of such lot does not own any other parcel or tract adjacent thereto, such lot may nonetheless be used for the erection or reconstruction of a single-family dwelling or for any non-dwelling use permitted in the district in which it is located, even though its area and width are less than the minimum requirements set forth herein.
(b) Where two (2) adjoining lots of record with less than the required area and width are held by one (1) owner, the Planning Commission may require that the lots be combined and used for one (1) principal building or use. In either case, the prevailing or required setback shall be met.
(c) Where three (3) or more contiguous unimproved lots of record with less than the required area and width are held by one (1) owner, the Planning Commission may require replatting to fewer lots to permit compliance with the minimum yard requirements.