Kendall County, IL Shrink-Swell Risk

Kendall County, IL's soil, for shrink-swell risk

Moderate

Kendall County, IL: USDA's soil survey rates 83.1% of the county "Moderate" for shrink-swell potential (4.02% linear extensibility). 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.

What Kendall County's reading doesn't cover

Two lots a mile apart in Kendall County can carry different soil, even though they share one countywide reading. A local geotechnical report, typically $1,000-$5,000 (around $2,700 typical), is the only way to know what one lot in Kendall County will actually do.

What it costs to find out, versus to ignore it

With Kendall 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.

Kendall County's rank among Illinois counties

Nationally, Kendall County, IL is the 551-most-constrained of 3,085 rated counties for shrink-swell soil. Within Illinois alone it ranks 28 of 101. Kendall County, IL is 320 square miles with a population of 143,171.

For contrast

Orleans Parish, LA carries this site's most-constrained reading. Northampton County, VA and Billings County, ND 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 Menard County, IL. The full underlying dataset is downloadable directly, one row per county.