Knox County, TX Shrink-Swell Risk

Knox County, TX's soil, for shrink-swell risk

Moderate

Knox County, TX: USDA's soil survey rates 59.4% of the county "Moderate" for shrink-swell potential (3.6% linear extensibility). 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.

What Knox County's reading doesn't cover

Two lots a mile apart in Knox County can carry different soil, even though they share one countywide reading. The real answer for one lot is still a site-specific geotechnical report, running about $1,000-$5,000 (typically near $2,700).

What it costs to find out, versus to ignore it

With Knox 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 Knox County, TX compares

Nationally, Knox County, TX is the 783-most-constrained of 3,085 rated counties for shrink-swell soil. Within Texas alone it ranks 158 of 253. Knox County covers 851 square miles and counts 3,255 residents.

For contrast

Orleans Parish, LA carries this site's most-constrained reading. Marion County, WV and Lincoln 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

More of Texas

Every county in Texas is on this site, including San Augustine County, TX and Live Oak County, TX. The full underlying dataset is downloadable directly, one row per county.