All required front yard depths and all maximum building heights based on front plot lines, as established in the applicable zoning district height and area regulations shall be measured from a line established as the designated street line, which shall be parallel to the street centerline, and at the distance from such street centerline equal to one-half (½) the minimum right-of-way width specified for each street classification as established for each street on the major street plan. For primary and secondary arterials, the Planning Commission may in its discretion establish the designated street line with respect to plots obtaining site plan approval or subdivision approval a distance up to one-half (½) the maximum right-of-way width as established on the major street plan.

On a corner plot, each plot line which abuts a street shall be deemed to be a front plot line, and the required yard along-both plot frontages shall be a required front yard. The owner shall elect, and so designate on the plot plan, which of the remaining two (2) required yards shall be the required side yard and the required rear yard.

A.

In the RS, R-1 and RGA zoning districts where corner lots front only one (1) of the intersecting streets within the same block, the corner lot shall maintain a front yard setback as required in the specific zoning district upon that street upon which other lots front, and the setback on the other intersecting street may be reduced to not less than twenty (20) feet, provided the adjoining lot provides the same reduced setback. (i.e., a platted side setback line may not adjoin the platted front yard setback of an adjoining lot).

B.

To encourage infill development in the R-1 zoning district for lots platted in older subdivisions that did not include building setback lines, and a replat is not required under the subdivision regulations, the front yard setback may be reduced to the average setback of existing homes along the same side of the street upon which a new single-family residential structure is built. This regulation applies to the following subdivisions; Brillhart's, Caenen, Caenen Gardens, Caenen Heights, Douglas, Long Look, Long Look Extension, McAnany Extension No. 1, Monrovia, South Monrovia, Town of Monticello, Town of Shawnee, Wager's and Wilder.