Comanche County, OK Shrink-Swell Risk

Comanche County, OK's soil, for shrink-swell risk

Moderate

Comanche County, OK: USDA's soil survey rates 43.8% of the county "Moderate" for shrink-swell potential (4.09% linear extensibility). Conventional foundations are the reasonable expectation here, with routine moisture-control practice rather than special engineering.

What Comanche County's reading doesn't cover

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

What it costs to find out, versus to ignore it

With Comanche County, OK 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.

Where this sits nationally

Nationally, Comanche County, OK is the 527-most-constrained of 3,085 rated counties for shrink-swell soil. Within Oklahoma alone it ranks 19 of 77. The county spans 1,069 square miles, home to 121,396 people.

Before you act on this

Orleans Parish, LA carries this site's most-constrained reading. Charlotte County, FL and Suffolk city, VA 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 Oklahoma

Every county in Oklahoma is on this site, including Tulsa County, OK and Atoka County, OK. The full underlying dataset is downloadable directly, one row per county.