Perry County, TN Shrink-Swell Risk

Perry County, TN's soil, for shrink-swell risk

Low

Perry County, TN: USDA's soil survey rates 91.6% of the county "Low" for shrink-swell potential (1.63% linear extensibility). That's as favorable a county-level reading as this dataset produces - standard foundation practice, pending one lot's own geotechnical report.

What Perry County's reading doesn't cover

Two lots a mile apart in Perry County can carry different soil, even though they share one countywide reading. 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 Perry County.

What it costs to find out, versus to ignore it

With Perry 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.

Perry County's rank among Tennessee counties

Nationally, Perry County, TN is the 2,354-most-constrained of 3,085 rated counties for shrink-swell soil. Within Tennessee alone it ranks 69 of 95. Perry County covers 415 square miles and counts 8,987 residents.

Before you act on this

Orleans Parish, LA carries this site's most-constrained reading. St. Clair County, MO and Guthrie County, IA 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 Hawkins County, TN and Haywood County, TN. The full underlying dataset is downloadable directly, one row per county.