Davidson County, TN Shrink-Swell Risk

What Davidson County, TN's soil means for a foundation

Low

USDA's SSURGO data puts Davidson County, TN's soil at "Low" shrink-swell potential, an area-weighted linear extensibility of 2.69% across 67.9% of the county's surveyed land. Among the 3,144 counties on this site, that's the clean result: little shrink-swell movement, standard construction the likely outcome.

This is a county figure, not a lot figure

USDA's survey covers the whole of Davidson County, TN at once, not any single address. A site-specific soil report, usually $1,000-$5,000, is what an engineer would actually pull before designing a foundation on a lot in Davidson County.

Report cost vs. repair cost

With Davidson County, TN rating "Low", 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.

Davidson County's rank among Tennessee counties

Nationally, Davidson County, TN is the 1,415-most-constrained of 3,085 rated counties for shrink-swell soil. Within Tennessee alone it ranks 20 of 95. The county spans 504 square miles, home to 729,505 people.

Before you act on this

Orleans Parish, LA carries this site's most-constrained reading. Neosho County, KS and Archuleta County, CO 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 Tennessee

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