What matters for project planning
On these grades the discharge point is the whole decision, and the city's stormwater concerns are the reason. Roof water released at the uphill side of a house does not soak in and disperse -- it runs downhill with force and arrives somewhere, which on a mountainside frequently means a neighboring property, a retaining wall, or the cut face of the lot itself. Retaining conditions therefore belong in a gutter conversation, because concentrated runoff behind a wall is one of the common ways those walls fail. Historic review can reach the placement and material of visible downspouts on a designated property, and mapped flood status matters where the parcel carries it.
Official sources
Verify the property, not just the city
Citywide context cannot establish a parcel’s flood zone, historic designation, stream buffer, permit requirements, soil conditions, or concealed construction. Those items should be verified with the appropriate Buncombe County authority and your chosen provider first.
Sources reviewed June 20, 2026. External requirements and maps can change.