Grant County, WI Shrink-Swell Risk

What Grant County, WI's soil means for a foundation

Moderate

USDA's SSURGO data puts Grant County, WI's soil at "Moderate" shrink-swell potential, an area-weighted linear extensibility of 3.44% across 66.8% of the county's surveyed land. That's a middle reading: not the sharp swings that crack a foundation outright, but enough that grading and drainage are worth getting right.

This is a county figure, not a lot figure

USDA's survey covers the whole of Grant County, WI at once, not any single address. A site-specific soil report, usually $1,000-$5,000, is what an engineer would actually pull before designing a foundation on a lot in Grant County.

Report cost vs. repair cost

With Grant County, WI 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, WI is the 876-most-constrained of 3,085 rated counties for shrink-swell soil. Within Wisconsin alone it ranks 7 of 72. Grant County covers 1,148 square miles and counts 52,330 residents.

For contrast

Orleans Parish, LA carries this site's most-constrained reading. Bureau County, IL and Henry County, VA 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 Wisconsin

Every county in Wisconsin is on this site, including Outagamie County, WI and Vernon County, WI. The full underlying dataset is downloadable directly, one row per county.