Oklahoma County, OK Shrink-Swell Risk

What Oklahoma County, OK's soil means for a foundation

Moderate

USDA's SSURGO data puts Oklahoma County, OK's soil at "Moderate" shrink-swell potential, an area-weighted linear extensibility of 3.28% across 51.9% of the county's surveyed land. Conventional foundations are the reasonable expectation here, with routine moisture-control practice rather than special engineering.

This is a county figure, not a lot figure

USDA's survey covers the whole of Oklahoma County, OK at once, not any single address. The real answer for one lot is still a site-specific geotechnical report, running about $1,000-$5,000 (typically near $2,700).

Report cost vs. repair cost

With Oklahoma 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, Oklahoma County, OK is the 985-most-constrained of 3,085 rated counties for shrink-swell soil. Within Oklahoma alone it ranks 38 of 77. Oklahoma County covers 709 square miles and counts 816,490 residents.

For contrast

Orleans Parish, LA carries this site's most-constrained reading. Branch County, MI and Auglaize County, OH 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 Pottawatomie County, OK and McClain County, OK. The full underlying dataset is downloadable directly, one row per county.