Fannin County, TX Shrink-Swell Risk
Fannin County, TX's soil, for shrink-swell risk
High
Fannin County, TX: USDA's soil survey rates 43.5% of the county "High" for shrink-swell potential (6.85% linear extensibility). Ground like this needs active moisture control to keep a conventional foundation from cracking - it's not automatic either way.
What Fannin County's reading doesn't cover
Two lots a mile apart in Fannin 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 Fannin County will actually do.
What it costs to find out, versus to ignore it
Fannin County's soil reading is exactly the case where a report before construction, or before cracks widen, pays for itself. The report ($1,000-$5,000) is what tells you whether Fannin County's county-level reading applies to your lot; the repair ($5,000-$15,000) is what it costs if you skip that and find out from the cracks instead.
How Fannin County, TX compares
Nationally, Fannin County, TX is the 82-most-constrained of 3,085 rated counties for shrink-swell soil. Within Texas alone it ranks 29 of 253. Fannin County covers 878 square miles and counts 38,650 residents.
Before you act on this
Orleans Parish, LA carries this site's most-constrained reading. Johnston County, NC and Wythe County, VA are worth a look for comparison.
How this reading is built, and its real limits · The warning signs of expansive-clay damage, explained
More of Texas
Every county in Texas is on this site, including Brewster County, TX and Nolan County, TX. The full underlying dataset is downloadable directly, one row per county.