Grant County, ND Shrink-Swell Risk
Grant County, ND's soil, for shrink-swell risk
Low
Grant County, ND: USDA's soil survey rates 69.5% of the county "Low" for shrink-swell potential (2.85% 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 Grant County's reading doesn't cover
Two lots a mile apart in Grant 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 Grant County will actually do.
What it costs to find out, versus to ignore it
With Grant County, ND 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.
Where this sits nationally
Nationally, Grant County, ND is the 1,317-most-constrained of 3,085 rated counties for shrink-swell soil. Within North Dakota alone it ranks 40 of 53. Grant County covers 1,659 square miles and counts 2,247 residents.
Before you act on this
Orleans Parish, LA carries this site's most-constrained reading. Rolette County, ND and St. Mary Parish, LA 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 North Dakota
Every county in North Dakota is on this site, including Sheridan County, ND and Benson County, ND. The full underlying dataset is downloadable directly, one row per county.