Kane County, IL Shrink-Swell Risk

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

Moderate

USDA's SSURGO data puts Kane County, IL's soil at "Moderate" shrink-swell potential, an area-weighted linear extensibility of 3.51% across 68.4% 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 Kane County, IL 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 Kane County.

Report cost vs. repair cost

With Kane 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 Kane County, IL compares

Nationally, Kane County, IL is the 833-most-constrained of 3,085 rated counties for shrink-swell soil. Within Illinois alone it ranks 60 of 101. The county spans 519 square miles, home to 520,997 people.

For contrast

Orleans Parish, LA carries this site's most-constrained reading. Guthrie County, IA and Erie County, NY 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 Stark County, IL and Alexander County, IL. The full underlying dataset is downloadable directly, one row per county.