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Article 3: Base Zoning Districts Section 3.3: Residential Districts Orange County, North Carolina – Unified Development Ordinance Page 3-2 SECTION 3.3: RESIDENTIAL DISTRICTS RB RURAL BUFFER DIMENSIONAL AND RATIO STANDARDS Lot Size, min. (square feet) 87,120 PURPOSE Lot Width, min. (feet) 130 The purpose of the Rural Buffer (RB) District is to provide locations for rural residential developments and agricultural, silvicultural or horticultural uses which serve to buffer or separate more intensively planned and/or developed portions of Orange County. Development within the Rural Buffer (RB) District is at very low densities (the minimum lot size per dwelling unit is two acres) and relies on individual wells and ground absorption systems for domestic water supply and sewage disposal, respectively. Front Setback from ROW, min. (feet) 40 [1] Corner Side Setback, min. (feet) 40 [2] APPLICABILITY Side Setback, min. (feet) 20 [1] This district will usually be applied where the following conditions exist: 1. Designated by the adopted Comprehensive Plan as Rural Buffer or by the adopted Joint Planning Area Land Use Plan as Rural Residential or both. 2. Urban services, including water distribution and sewage collection mains, are not likely within 10-20 years. Rear Setback, min. (feet) 20 [1] Height, max. (feet) 25 [3] DIMENSIONAL STANDARDS NOTES: [1] Accessory structures shall not be erected in any required front open space and shall also conform to all other regulations. [2] Any corner lot having an abutting interior lot on its side street shall observe a front yard setback from both streets provided, however, that this requirement does not reduce the width suitable for a building on said lot to less than 25 feet. (See graphic in Section 6.2.7). [3] Two feet of additional height shall be allowed for one foot increase of the required front and side setbacks. [4] R = residential, NR = non-residential, CU = conditional use [5] Permitted non-residential uses existing as of 5/6/98 shall be limited to a maximum floor area ratio of .141 in the RB, AR, R-1, R- 2, R-3, and R-4 zoning districts. Floor Area Ratio, max. R-CU [4] .058 NR .088 [5] NR-CU .100 [5] Required Open Space Ratio, min. R-CU NR NR-CU .84 Required Livability Space Ratio, min. R-CU .75 Required Recreation Space Ratio, min. R .028 R-CU .031 Gross Land Area, min. (square feet) R-CU NR- CU 174.240 Required Pedestrian/ Landscape Ratio, min. NR NR- CU .21 RB DISTRICT SPECIFIC DEVELOPMENT STANDARDS 1. Uses shall be restricted to those indicated for the RB District in Section 5.2, unless a Conditional Use (CU) or MPD-CZ District is approved (see Section 3.8). 2. Development within the zoning district shall be subject to all applicable use standards detailed in Article 5 and all applicable development standards detailed in Article 6 of this Ordinance. 3. While the Minimum Lot Size may be 87,120 square feet, the density permitted on a given parcel is based on the Watershed Protection Overlay District in which the property is located. Refer to Section 4.2.4 for a breakdown of the allowable density (i.e., the number of individual dwellings that can be developed on a parcel of property). 4. Allowable impervious surface area is based on the Watershed Protection Overlay District in which the property is located. Refer to Section 4.2.5 for a breakdown of the allowable impervious surface area. 5. For lots outside of a Watershed Protection Overlay District (see Section 4.2), the minimum usable lot area for lots that utilize ground absorption wastewater systems shall be 30,000 square feet for parcels between 24