Ogle County, IL Shrink-Swell Risk

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

Moderate

USDA's SSURGO data puts Ogle County, IL's soil at "Moderate" shrink-swell potential, an area-weighted linear extensibility of 3.43% across 75.9% of the county's surveyed land. A real but modest amount of movement - standard foundations usually hold up, but drainage and moisture control around the foundation still matter more than on low-risk soil.

This is a county figure, not a lot figure

USDA's survey covers the whole of Ogle 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 Ogle County will actually do.

Report cost vs. repair cost

With Ogle 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 Ogle County, IL compares

Nationally, Ogle County, IL is the 887-most-constrained of 3,085 rated counties for shrink-swell soil. Within Illinois alone it ranks 70 of 101. Ogle County covers 759 square miles and counts 51,345 residents.

For contrast

Orleans Parish, LA carries this site's most-constrained reading. Brunswick County, NC and Wayne County, NE 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 Lake County, IL and Winnebago County, IL. The full underlying dataset is downloadable directly, one row per county.