Secondary and Cumulative Impacts Master Management Plan - 2014

Article 5 Lot and Building Standards 5-12 Cluster and Open Space Development

R-80 R-40 R-30 R-20 R-15 R-10 R-5

HD RHC

Rear

30

30

30

30

30

30

30

30

30

Maximum Impervious Coverage (% of lot) Residential Development [1] [2] [3] Nonresidential Development [1] [2] [3] [5] Maximum Building Height (feet) Minimum Building Separation (feet)

30 30 35 NA

30 30 35 NA

30 30 35 NA

30 30 35 NA

30 30 35 NA

30 30 35 NA

30 30 [4] 20

30 30 35 NA

30 30 35

NA [1] In some cases, more restrictive standards may apply to lots within the Swift Creek, Little River and Smith Creek Water Supply Watersheds. See Article 11.Part 3. [2] Lots created after 7/01/2001 are subject to Wake County stormwater management regulations. [3] Nitrogen export check required and is limited to 3.6 lbs./ac./yr. without best management practices or payments made to the N.C. Ecosystem Enhancement Program. Does not apply to nonresidential development in R-80W and R-40W districts. [4] Maximum height in R-5 = 35 feet or 1 foot of building height for each 3 feet that the building is set back from front, side and rear property lines, whichever allows the greater height. [5] Nonresidential Development in HD may exceed 30 percent maximum impervious. See 3-23-5(A)(2). Commentary: At the time of subdivision plat review, Wake County’s Department of Environmental Services will review subdivisions for compliance with impervious surface coverage limitation. This review will be based on the total impervious surface coverage of the subdivision as a whole, as opposed to the impervious cover on individual lots. Stormwater management devices will be required if the subdivision as a whole exceeds 15% impervious cover. [Amended on 1/22/2008 by OA 04-07.] 5-12 Cluster and Open Space Development 5-12-1 Purpose The regulations of this section are intended to encourage subdivision design that is more efficient and provides greater protection of open space and natural resources than conventional subdivision designs. Cluster and open space subdivision designs allow more compact and less costly networks of roads and utilities. They also help reduce stormwater run-off and non-point source pollutant loading rates and may help to preserve an area’s rural character. Cluster and open space subdiv isions are intended to encourage the provision of needed open space and recreational amenities for residents, while also helping to retain an area’s chara cter and preserve natural, environmentally sensitive and historic resources. 5-12-2 General Description (A) The cluster and open space development standards of this section require that a specified portion of each subdivision be set aside and permanently preserved as open space. The primary difference between cluster developments and open space developments is the amount of open space that must be preserved. Cluster developments are required to set aside a modest amount of open space, while open space developments are required to set aside a far greater amount. (B) The required open space area within cluster or open space developments can be used to provide recreational opportunities for the subdivision's residents, to conserve and protect significant natural resources, or to conserve productive farming and forestry uses. 5-12-3 Minimum Subdivision Site Size (A) Cluster Development The minimum required land area for a cluster development is 10 acres.

Wake County Unified Development Code 5-2