Grundy County, IA Shrink-Swell Risk

Grundy County's SSURGO shrink-swell reading

Moderate

In Grundy County, IA, 81.6% of the surveyed soil carries a "Moderate" shrink-swell rating, 4.14% 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

Grundy 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 Grundy County will actually do.

Budgeting for Grundy County, IA

Grundy 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.

Grundy County's rank among Iowa counties

Among the 3,085 rated counties on this site, Grundy County, IA ranks 506 most-constrained nationally, and 38 of 99 within Iowa. Grundy County, IA is 502 square miles with a population of 12,405.

See how another county compares

Orleans Parish, LA carries this site's most-constrained reading. Wasco County, OR and Adair County, MO 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 Iowa

Every county in Iowa is on this site, including Sioux County, IA and Sac County, IA. The full underlying dataset is downloadable directly, one row per county.