Adair County, IA Shrink-Swell Risk

Adair County's SSURGO shrink-swell reading

Moderate

In Adair County, IA, 82.8% of the surveyed soil carries a "Moderate" shrink-swell rating, 5.39% linear extensibility on average. Conventional foundations are the reasonable expectation here, with routine moisture-control practice rather than special engineering.

Before you rely on this for one address

Adair County's reading is an average across the whole county, not a promise about any one lot inside it. A site-specific soil report, usually $1,000-$5,000, is what an engineer would actually pull before designing a foundation on a lot in Adair County.

Budgeting for Adair County, IA

Adair 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 Adair County, IA compares

Among the 3,085 rated counties on this site, Adair County, IA ranks 229 most-constrained nationally, and 12 of 99 within Iowa. Adair County covers 569 square miles and counts 7,431 residents.

For contrast

Orleans Parish, LA carries this site's most-constrained reading. Anderson County, KY and San Miguel County, CO 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 Franklin County, IA and Carroll County, IA. The full underlying dataset is downloadable directly, one row per county.