Brown County, IL Shrink-Swell Risk

Brown County's SSURGO shrink-swell reading

Moderate

In Brown County, IL, 57.8% of the surveyed soil carries a "Moderate" shrink-swell rating, 3.5% linear extensibility on average. Conventional foundations are the reasonable expectation here, with routine moisture-control practice rather than special engineering.

Before you rely on this for one address

Brown County's reading is an average across the whole county, not a promise about any one lot inside it. 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 Brown County.

Budgeting for Brown County, IL

Brown County's soil reading points toward standard foundation practice as the likely outcome, not the exception. 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

Among the 3,085 rated counties on this site, Brown County, IL ranks 847 most-constrained nationally, and 62 of 101 within Illinois. The county spans 306 square miles, home to 6,307 people.

Before you act on this

Orleans Parish, LA carries this site's most-constrained reading. Jackson County, WV and Sussex 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

Elsewhere in Illinois

Every county in Illinois is on this site, including Perry County, IL and De Witt County, IL. The full underlying dataset is downloadable directly, one row per county.