Ellis County, TX Shrink-Swell Risk
Shrink-swell potential in Ellis County, TX
Very High
Soil across 58.5% of Ellis County, TX comes back "Very High" in USDA's shrink-swell data, averaging 9.15% linear extensibility. This is the reading most likely to explain cracking a homeowner is already seeing. An engineered foundation design, not a conventional footing, is the realistic expectation for new construction.
What this number does and doesn't tell you
This is a countywide, area-weighted figure across every soil survey map unit in Ellis County, TX - never a reading for one specific parcel. The real answer for one lot is still a site-specific geotechnical report, running about $1,000-$5,000 (typically near $2,700).
Ellis County: the real numbers
With Ellis County, TX rating "Very High", the gap between finding out early and finding out late is the whole decision. 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.
Where this sits nationally
Among the 3,085 rated counties on this site, Ellis County, TX ranks 39 most-constrained nationally, and 5 of 253 within Texas. Ellis County, TX is 936 square miles with a population of 232,387.
For contrast
Orleans Parish, LA carries this site's most-constrained reading. Kent County, TX and Union County, OH 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 Terrell County, TX and Atascosa County, TX. The full underlying dataset is downloadable directly, one row per county.