Boone County, IN Shrink-Swell Risk
What Boone County, IN's soil means for a foundation
Moderate
USDA's SSURGO data puts Boone County, IN's soil at "Moderate" shrink-swell potential, an area-weighted linear extensibility of 3.39% across 54.3% 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 Boone County, IN 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 Boone County will actually do.
Report cost vs. repair cost
With Boone County, IN 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.
Boone County's rank among Indiana counties
Nationally, Boone County, IN is the 910-most-constrained of 3,085 rated counties for shrink-swell soil. Within Indiana alone it ranks 24 of 90. Boone County, IN is 423 square miles with a population of 78,773.
Before you act on this
Orleans Parish, LA carries this site's most-constrained reading. Cass County, MI and San Francisco County, CA 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 Indiana
Every county in Indiana is on this site, including Jackson County, IN and Spencer County, IN. The full underlying dataset is downloadable directly, one row per county.