No parcel of land held under separate ownership at the time of the effective date of this title may be reduced in any manner below the minimum standards established by this title for the district within which the lot is located.

(1965 code Title XII, Ch. 3, § 9(A))

In computing the lot area of a lot which abuts upon one or more alleys, one-half of the width of such alley or alleys may be assumed to be a portion of the lot.

(1965 code Title XII, Ch. 3, § 9(D))

On through lots, either line separating such lot from a public thoroughfare may be designated by the owner as the front lot line. In such cases, the minimum rear yard is the average of the yards on lots next adjoining. If such lots next adjoining are undeveloped, the minimum rear yard shall conform to the front yard setback for the zone in which the property is located.

(1965 code Title XII, Ch. 3, § 9(E))