Washington County, IL Shrink-Swell Risk

Washington County's SSURGO shrink-swell reading

Moderate

In Washington County, IL, 69.4% of the surveyed soil carries a "Moderate" shrink-swell rating, 3.7% linear extensibility on average. 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.

Before you rely on this for one address

Washington County's reading is an average across the whole county, not a promise about any one lot inside it. The real answer for one lot is still a site-specific geotechnical report, running about $1,000-$5,000 (typically near $2,700).

Budgeting for Washington County, IL

Washington 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.

How Washington County, IL compares

Among the 3,085 rated counties on this site, Washington County, IL ranks 724 most-constrained nationally, and 44 of 101 within Illinois. Washington County, IL is 563 square miles with a population of 13,535.

Before you act on this

Orleans Parish, LA carries this site's most-constrained reading. Stanly County, NC and Clare County, MI 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 Richland County, IL and Cass County, IL. The full underlying dataset is downloadable directly, one row per county.