Iowa County, IA Shrink-Swell Risk

Iowa County, IA's soil, for shrink-swell risk

Moderate

Iowa County, IA: USDA's soil survey rates 62.2% of the county "Moderate" for shrink-swell potential (3.96% linear extensibility). Conventional foundations are the reasonable expectation here, with routine moisture-control practice rather than special engineering.

What Iowa County's reading doesn't cover

Two lots a mile apart in Iowa 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 Iowa County will actually do.

What it costs to find out, versus to ignore it

With Iowa County, IA 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.

Iowa County's rank among Iowa counties

Nationally, Iowa County, IA is the 592-most-constrained of 3,085 rated counties for shrink-swell soil. Within Iowa alone it ranks 45 of 99. Iowa County, IA is 586 square miles with a population of 16,423.

See how another county compares

Orleans Parish, LA carries this site's most-constrained reading. Clinch County, GA and Taliaferro County, GA 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 Iowa

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