The lot width or area requirement of this chapter shall be automatically waived to permit the erection of a single-family dwelling or the restoration, enlargement (but no additional dwelling units), moving, repair or alteration of an existing single-family dwelling on any lot of record which was owned separately and individually from all other tracts of land on the effective date of this chapter or on the effective date of any subsequent amendment increasing the lot size requirements for such lot, provided that:
A.
Such use is permitted in the district where such lot is located.
B.
All other regulations prescribed in this chapter shall apply thereto; provided, however, that no side yard shall be less than seven feet and the total width of both side yards shall not be less than 17 feet.
C.
The lot area is large enough for adequate sewage disposal where individual private sewage systems are employed.