No lot or lot of record may be improved unless it is in conformity with the requirements of this Zoning Ordinance, except as provided in Section 9.11 of this Zoning Ordinance, unless the lot or lot of record is located in a residential zoning district and does not meet the requirements of Article IV as to lot area or width, in which case it may be improved for a detached single-family residence in accordance with all other requirements of this Zoning Ordinance.
(1) 
Applicability. Notwithstanding Section 9.10 of this Zoning Ordinance to the contrary, the following types of nonconforming lots and lots of record, if located in a residential zoning district and nonconforming as to lot area and/or lot width, may be improved in accordance with this Section 9.11:
a. 
Lots or of lots of record that have not at any time been held in contiguous ownership subsequent to the effective date of this Zoning Ordinance; and
b. 
Single lots record held in contiguous ownership with an adjacent existing lot that is improved with a principal structure.
(2) 
The improvement of any lot or lot of record permitted in accordance with this Section 9.11 shall comply with the following standards:
a. 
Side and rear yard building setbacks. Each side and rear yard shall be of a depth not less than 10% of the lot width and 20% of lot depth; provided, however, that no side yard shall be of a depth less than five feet, and no rear yard shall be of a depth less than 20 feet.
b. 
Front yard setback. The minimum front yard shall be of a depth not less than 20% of the lot depth.