Roanoke County, VA Shrink-Swell Risk

Roanoke County, VA's soil, for shrink-swell risk

Low

Roanoke County, VA: USDA's soil survey rates 85.7% of the county "Low" for shrink-swell potential (1.89% linear extensibility). That's the easiest starting point on this site's scale - a standard foundation is the reasonable default here, though any one lot can still differ.

What Roanoke County's reading doesn't cover

Two lots a mile apart in Roanoke County can carry different soil, even though they share one countywide reading. A local geotechnical report, typically $1,000-$5,000 (around $2,700 typical), is the only way to know what one lot in Roanoke County will actually do.

What it costs to find out, versus to ignore it

With Roanoke County, VA rating "Low", a geotechnical report is still worthwhile before a build, just less urgent than in a high-risk county. A geotechnical report runs $1,000-$5,000, typically around $2,700. Foundation repair, if a specific lot turns out to differ from the county average, runs $5,000-$15,000.

How Roanoke County, VA compares

Nationally, Roanoke County, VA is the 2,081-most-constrained of 3,085 rated counties for shrink-swell soil. Within Virginia alone it ranks 87 of 114. Roanoke County covers 251 square miles and counts 97,334 residents.

For contrast

Orleans Parish, LA carries this site's most-constrained reading. Lee County, IA and Hyde County, NC are worth a look for comparison.

How this reading is built, and its real limits · Moisture management: the cheap fix that works on any soil

More of Virginia

Every county in Virginia is on this site, including Greensville County, VA and Warren County, VA. The full underlying dataset is downloadable directly, one row per county.