Environmental Rules in Buncombe County, NC (2026)
3 rules for unincorporated Buncombe County, North Carolina.
Verified from official government sources
Stormwater Management
New development or redevelopment of one acre or more in unincorporated Buncombe County needs an approved stormwater permit under County Code Sec. 26-322(a), with high-density projects required to remove at least 85 percent of suspended solids and keep built-upon area 30 feet from streams.
Stormwater Permit Rules
Some RestrictionsBuncombe County Code Sec. 26-322(a); Sec. 26-362(b)(2)
(a)A stormwater permit is required for all development and redevelopment which equals or exceeds one acre of residential development, or on commercial lots that are one acre in size or more, unless exempt pursuant to this article...(2)Development standards for high density projects. High-density projects shall comply with each of the following standards.a.The measures for high density projects ...
Erosion Control
Disturbing one acre or more of land anywhere in unincorporated Buncombe County, or as little as a quarter acre on a steep residential lot, requires an approved erosion control plan and a land-disturbing permit under County Code Sec. 26-211. Skipping the permit draws escalating civil penalties up to $5,000 per day.
Erosion & Sediment Control Permits
Some RestrictionsBuncombe County Code Sec. 26-211(a) and (c)
(a)Plan required. No person shall initiate any land disturbing activity as defined in this section without an erosion control plan as described in section 26-228, approved by the county, and without having a land disturbing permit as described in section 26-226. For the purposes of this article, an erosion control plan shall be required for:(1)Any land disturbing activity which uncovers one or ...
Flood Zones
Buncombe County, North Carolina enforces flood damage prevention under Chapter 34, Article II of the Buncombe County Code, administered by the Planning and Development Department's Floodplain Administrator. The county joined the National Flood Insurance Program (NFIP) in 1980 under FEMA Community Identification Number 370031, with the City of Asheville participating separately under CID 370032. Following the catastrophic flooding from Tropical Storm Helene in September 2024 (when the French Broad River at Asheville crested at 24.7 feet and the Swannanoa River at Biltmore reached 26.1 feet, breaking previous records by more than six feet), the Board of Commissioners unanimously adopted a Flood Damage Prevention Ordinance Text Amendment on April 22, 2026 imposing higher regulatory standards.
Flood Zone and Floodplain Rules in Buncombe County
Heavy RestrictionsBuncombe County Code, Chapter 34, Article II (Flood Damage Prevention Ordinance)
Buncombe County's Flood Damage Prevention Ordinance regulates development within the 100-year floodplain, including new structures, additions or changes to existing structures, grading, filling, or any other man-made change within the floodplain. A permit application with applicable review fees is required. There are floodways and non-encroachment areas in which no development can occur without...
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