Cumberland County, IL Shrink-Swell Risk

What Cumberland County, IL's soil means for a foundation

Moderate

USDA's SSURGO data puts Cumberland County, IL's soil at "Moderate" shrink-swell potential, an area-weighted linear extensibility of 3.49% across 71.9% 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 Cumberland County, IL 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 Cumberland County will actually do.

Report cost vs. repair cost

With Cumberland County, IL 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.

How Cumberland County, IL compares

Nationally, Cumberland County, IL is the 852-most-constrained of 3,085 rated counties for shrink-swell soil. Within Illinois alone it ranks 64 of 101. The county spans 346 square miles, home to 10,305 people.

For contrast

Orleans Parish, LA carries this site's most-constrained reading. Adair County, IA and Claiborne County, TN 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 Illinois

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