Comal County, TX Shrink-Swell Risk

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

Moderate

Comal County, TX: USDA's soil survey rates 52.6% of the county "Moderate" for shrink-swell potential (4.33% 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 Comal County's reading doesn't cover

Two lots a mile apart in Comal 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 Comal County will actually do.

What it costs to find out, versus to ignore it

With Comal 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.

Where this sits nationally

Nationally, Comal County, TX is the 429-most-constrained of 3,085 rated counties for shrink-swell soil. Within Texas alone it ranks 106 of 253. The county spans 560 square miles, home to 201,628 people.

See how another county compares

Orleans Parish, LA carries this site's most-constrained reading. Orange County, TX and LaGrange 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 Austin County, TX and Medina County, TX. The full underlying dataset is downloadable directly, one row per county.