Jackson County, TN Shrink-Swell Risk

Shrink-swell potential in Jackson County, TN

Moderate

Soil across 66% of Jackson County, TN comes back "Moderate" in USDA's shrink-swell data, averaging 3.18% 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 this number does and doesn't tell you

This is a countywide, area-weighted figure across every soil survey map unit in Jackson County, TN - 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).

Jackson County: the real numbers

Jackson 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.

Where this sits nationally

Among the 3,085 rated counties on this site, Jackson County, TN ranks 1,066 most-constrained nationally, and 12 of 95 within Tennessee. Jackson County, TN is 309 square miles with a population of 12,376.

Before you act on this

Orleans Parish, LA carries this site's most-constrained reading. Chippewa County, MN and Grand Traverse County, MI 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 Lawrence County, TN and Williamson County, TN. The full underlying dataset is downloadable directly, one row per county.