Chapter 18. General Zoning Ordinance
Sec. 18-72. Yard Setback Adjustments
(1) Lot size and minimum yard dimensions. No lot, yard, court, parking area, or other space shall be reduced in area or dimension so as to make the area or dimension less than the minimum required by this chapter. If an existing yard is less than the minimum required, it shall not be reduced further, except where exempted by the provisions of this Section.
(2) Front Yard or Street Side Setback Adjustments.
(a) In the SR-2, SR-3, SR-4, SR-6, TR-6, MR-12, MR-24, MH-8, NMU, UMU, and CMU districts where the average depth of existing front yards and street side yards on the 5 or fewer adjoining lots nearest to the lot in question, on the same side of the street and within the same block front, is less than the least front yard and street side yard depth prescribed elsewhere in this chapter, the required depth of the front yard and the street side yard on such lot may be modified to be not less than the average depth of the existing front yards and street side yards; provided, however, that in a residential district the depth of the minimum front yard and side street side yard on any lot shall be at least 15 feet and the minimum setback for an attached or detached garage facing the front yard, or the street side yard, shall be at least 20 feet except where the provisions of Section 18-65(8)(i) are met.
(3) Side and Rear Yard Adjustments for Bufferyards. In instances where the required bufferyard width (per Article VIII) exceeds the minimum required setback width, the minimum required bufferyard width shall prevail.
(4) Street Setback Adjustments. A special setback of 50 feet shall be required along existing and proposed primary and minor arterial streets shown in the National Functional Classification map of the Comprehensive Plan.
(a) For existing streets, the setback shall be measured from the right of way line. For proposed streets, the setback shall be added to one-half the proposed right of way width and measured from the anticipated street centerline.
(b) The special setback shall not apply in the DMU district.
(c) In the SR-2, SR-3, SR-4, SR-6, TR-6, MR-12, MR-24, MH-8, NMU, CMU, and UMU districts, a front yard setback may be reduced to the mean of the setbacks of the immediately adjoining lots that are on both sides of the subject lot. The following rules apply in calculating the mean setback (see Figure 18-72):
1. Only the setbacks on 5 or fewer adjoining lots, are contiguous to each other in either direction of the subject lot, and are on the same side of the street as each other may be used.
2. Where a lot is vacant, the minimum setback of the zoning district will be applied to the vacant lot and factored into the averaging calculation.
3. Outliers shall be excluded in calculating the mean setback as determined by the Zoning Administrator.
4. In residential districts, the depth of the minimum front yard and side street side yard on any lot shall be at least 15 feet and the minimum setback for an attached or detached garage facing the front yard, or the street side yard, shall be at least 20 feet except where the provisions of Section 18-65(8)(i) are met.
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