San Augustine County, TX Shrink-Swell Risk

What San Augustine County, TX's soil means for a foundation

Moderate

USDA's SSURGO data puts San Augustine County, TX's soil at "Moderate" shrink-swell potential, an area-weighted linear extensibility of 3.85% across 52.2% of the county's surveyed land. A real but modest amount of movement - standard foundations usually hold up, but drainage and moisture control around the foundation still matter more than on low-risk soil.

This is a county figure, not a lot figure

USDA's survey covers the whole of San Augustine County, TX at once, not any single address. A local geotechnical report, typically $1,000-$5,000 (around $2,700 typical), is the only way to know what one lot in San Augustine County will actually do.

Report cost vs. repair cost

With San Augustine County, TX 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.

How San Augustine County, TX compares

Nationally, San Augustine County, TX is the 650-most-constrained of 3,085 rated counties for shrink-swell soil. Within Texas alone it ranks 141 of 253. San Augustine County, TX is 531 square miles with a population of 7,767.

See how another county compares

Orleans Parish, LA carries this site's most-constrained reading. Montgomery County, MD and Adams County, IN 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 Texas

Every county in Texas is on this site, including Sterling County, TX and Sabine County, TX. The full underlying dataset is downloadable directly, one row per county.