Wilkinson County, MS Shrink-Swell Risk

What Wilkinson County, MS's soil means for a foundation

Moderate

USDA's SSURGO data puts Wilkinson County, MS's soil at "Moderate" shrink-swell potential, an area-weighted linear extensibility of 4.21% across 76.9% 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 Wilkinson County, MS 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 Wilkinson County, MS 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, Wilkinson County, MS is the 472-most-constrained of 3,085 rated counties for shrink-swell soil. Within Mississippi alone it ranks 18 of 82. Wilkinson County, MS is 678 square miles with a population of 7,820.

See how another county compares

Orleans Parish, LA carries this site's most-constrained reading. Clarke County, GA and Knox County, IL 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 Mississippi

Every county in Mississippi is on this site, including Grenada County, MS and Attala County, MS. The full underlying dataset is downloadable directly, one row per county.