Rockwall County, TX Shrink-Swell Risk

Shrink-swell potential in Rockwall County, TX

High

Soil across 48.7% of Rockwall County, TX comes back "High" in USDA's shrink-swell data, averaging 8.87% linear extensibility. Ground like this needs active moisture control to keep a conventional foundation from cracking - it's not automatic either way.

What this number does and doesn't tell you

This is a countywide, area-weighted figure across every soil survey map unit in Rockwall County, TX - never a reading for one specific parcel. A local geotechnical report, typically $1,000-$5,000 (around $2,700 typical), is the only way to know what one lot in Rockwall County will actually do.

Rockwall County: the real numbers

Rockwall County's soil reading is exactly the case where a report before construction, or before cracks widen, pays for itself. A geotechnical report runs $1,000-$5,000 (typically $2,700); an actual foundation repair, once cracking sets in, typically runs $5,000-$15,000 (around $10,000 typical) - roughly 4x the report.

How Rockwall County, TX compares

Among the 3,085 rated counties on this site, Rockwall County, TX ranks 46 most-constrained nationally, and 9 of 253 within Texas. The county spans 127 square miles, home to 137,044 people.

For contrast

Orleans Parish, LA carries this site's most-constrained reading. Dickey County, ND and York County, ME are worth a look for comparison.

How this reading is built, and its real limits · The warning signs of expansive-clay damage, explained

Elsewhere in Texas

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