Williamson County, TN Shrink-Swell Risk

Shrink-swell potential in Williamson County, TN

Low

Soil across 65.6% of Williamson County, TN comes back "Low" in USDA's shrink-swell data, averaging 2.54% linear extensibility. Among the 3,144 counties on this site, that's the clean result: little shrink-swell movement, standard construction the likely outcome.

What this number does and doesn't tell you

This is a countywide, area-weighted figure across every soil survey map unit in Williamson County, TN - 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 Williamson County will actually do.

Williamson County: the real numbers

Williamson County's soil reading points toward standard foundation practice as the likely outcome, not the exception. 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 Williamson County, TN compares

Among the 3,085 rated counties on this site, Williamson County, TN ranks 1,518 most-constrained nationally, and 23 of 95 within Tennessee. Williamson County covers 583 square miles and counts 269,136 residents.

Before you act on this

Orleans Parish, LA carries this site's most-constrained reading. St. James Parish, LA and Golden Valley County, ND 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

Elsewhere in Tennessee

Every county in Tennessee is on this site, including Dyer County, TN and Madison County, TN. The full underlying dataset is downloadable directly, one row per county.