Grant County, KY Shrink-Swell Risk
What Grant County, KY's soil means for a foundation
Moderate
USDA's SSURGO data puts Grant County, KY's soil at "Moderate" shrink-swell potential, an area-weighted linear extensibility of 3.63% across 85.6% of the county's surveyed land. Conventional foundations are the reasonable expectation here, with routine moisture-control practice rather than special engineering.
This is a county figure, not a lot figure
USDA's survey covers the whole of Grant County, KY at once, not any single address. 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.
Report cost vs. repair cost
With Grant County, KY rating "Moderate", 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, KY is the 770-most-constrained of 3,085 rated counties for shrink-swell soil. Within Kentucky alone it ranks 22 of 120. Grant County, KY is 258 square miles with a population of 25,722.
Before you act on this
Orleans Parish, LA carries this site's most-constrained reading. Dodge County, WI and Deschutes County, OR 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 Kentucky
Every county in Kentucky is on this site, including Harrison County, KY and Ballard County, KY. The full underlying dataset is downloadable directly, one row per county.