Warren County, IA Shrink-Swell Risk

Shrink-swell potential in Warren County, IA

Moderate

Soil across 57.1% of Warren County, IA comes back "Moderate" in USDA's shrink-swell data, averaging 5.68% linear extensibility. Conventional foundations are the reasonable expectation here, with routine moisture-control practice rather than special engineering.

What this number does and doesn't tell you

This is a countywide, area-weighted figure across every soil survey map unit in Warren County, IA - never a reading for one specific parcel. 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 Warren County.

Warren County: the real numbers

Warren 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.

Warren County's rank among Iowa counties

Among the 3,085 rated counties on this site, Warren County, IA ranks 188 most-constrained nationally, and 5 of 99 within Iowa. The county spans 570 square miles, home to 56,343 people.

Before you act on this

Orleans Parish, LA carries this site's most-constrained reading. Randolph County, GA and Thomas County, KS 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 Des Moines County, IA and Osceola County, IA. The full underlying dataset is downloadable directly, one row per county.