(A) In any residential district where the front yards of existing principal buildings in a block-front are either greater or less than the minimum required front yard for such district, the required front yard depth shall be disregarded, subject to the following conditions.
(1) Any principal building hereafter erected on an interior lot on such blockfront shall provide a minimum front yard at least equal to the average setback of the principal buildings on the lots abutting said front yard. If no such principal building exists on an abutting lot, the minimum setback for the district shall be used in computing said average setback. In the case of a corner lot having no principal building, the minimum setback shall be assumed to be three-fourths of the minimum required front yard for the district, and this distance shall be used in computing said average setback. In computing the minimum front yard requirements, setbacks in excess of 35 feet in R-1 and R-1A Districts shall be considered to be 35 feet and setbacks in excess of 25 feet in R-2 and R-3 Districts shall be considered to be 25 feet, and in R-4 Districts shall be considered to be 20 feet.
(2) No new principal building shall project into the required front yard for said district more than one-third of the distance separating the subject building from the nearest principal building on the abutting lot.
(3) The provisions of this division (A) shall never require greater front yard depth than 35 feet in R-1 or R-1A Districts, 25 feet in R-2 and R-3 Districts, or 20 feet in R-4 Districts.
(B) In cases where less than the full required future right-of-way width of a street has been deeded or dedicated, the building setback on any properties abutting thereon which have not provided for sufficient street area by deed or dedication shall be measured from the future required right-of-way line. This required street width shall be determined for minor residential streets by the standards set forth in the platting regulations and for any other street by the Trafficways Plan or any amendment thereto.
(C) The depth of any rear yard abutting upon a street shall be not less than the depth of front yards required for a conforming building of similar height on an adjoining lot fronting on such street.
(D) Whenever there is a public alley at the rear of a lot upon which the lot abuts for its full width, measurement of the depth of any abutting rear yard required for a principal building under this chapter may be made to the centerline of such alley.
(Prior Code, § 153.052) (Ord. D-1418, § 413, passed 11-22-1982, effective 1-21-1983)