Surry County, NC Building Setbacks & Zoning: Lot Coverage Limits (2026)

Outside a mapped watershed overlay, Surry County's zoning chapter does not cap lot coverage or impervious surface as a flat percentage. The Planning and Development Department instead controls building footprint indirectly, through the § 154.006-15 dimensional table's minimum lot area, width, depth and yard setbacks for each conventional district. The only place the county sets a real numeric impervious limit is § 154.017-12, Water Supply Watershed Protection, which applies in the WS-II and WS-IV watersheds covering the Fisher River, Tom's Creek, Elkin Creek, Stewart's Creek, Ararat River and Yadkin River (King) drainage areas.

There, built-upon area, the county's practical measure of impervious cover tied to the LOT COVERAGE definition in § 154.003-02, is capped by watershed classification and can be increased only through the '10/70 Rule' in § 154.017-12(I): a project in a non-critical watershed may occupy up to 10% of the protected area with up to 70% built-upon area if the Zoning Administrator approves it as a special intensity allocation. SIA projects must still minimize built-upon surface area, route stormwater away from surface waters, and use best management practices for water quality.

Cluster development is allowed in every watershed area, but the total number of lots and the built-upon area for the whole project still cannot exceed what the applicable critical-area, balance-of-watershed or protected-area classification permits. Anyone building in one of the named watersheds should confirm classification and built-upon-area allowance with Planning and Development before finalizing a site plan, since exceeding a watershed limit is a separate violation from any base-district setback issue.