Johnson County, KS Shrink-Swell Risk

Johnson County's SSURGO shrink-swell reading

Moderate

In Johnson County, KS, 55.9% of the surveyed soil carries a "Moderate" shrink-swell rating, 5.98% linear extensibility on average. That's a middle reading: not the sharp swings that crack a foundation outright, but enough that grading and drainage are worth getting right.

Before you rely on this for one address

Johnson County's reading is an average across the whole county, not a promise about any one lot inside it. A local geotechnical report, typically $1,000-$5,000 (around $2,700 typical), is the only way to know what one lot in Johnson County will actually do.

Budgeting for Johnson County, KS

Johnson 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.

Where this sits nationally

Among the 3,085 rated counties on this site, Johnson County, KS ranks 134 most-constrained nationally, and 10 of 105 within Kansas. Johnson County, KS is 474 square miles with a population of 632,276.

Before you act on this

Orleans Parish, LA carries this site's most-constrained reading. Walton County, FL and Vermillion County, IN 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 Kansas

Every county in Kansas is on this site, including Pottawatomie County, KS and Lane County, KS. The full underlying dataset is downloadable directly, one row per county.