Carroll County, TN Shrink-Swell Risk

Shrink-swell potential in Carroll County, TN

Low

Soil across 96.4% of Carroll County, TN comes back "Low" in USDA's shrink-swell data, averaging 1.65% linear extensibility. That's the easiest starting point on this site's scale - a standard foundation is the reasonable default here, though any one lot can still differ.

What this number does and doesn't tell you

This is a countywide, area-weighted figure across every soil survey map unit in Carroll County, TN - never a reading for one specific parcel. 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 Carroll County.

Carroll County: the real numbers

Carroll 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, Carroll County, TN ranks 2,336 most-constrained nationally, and 66 of 95 within Tennessee. Carroll County covers 598 square miles and counts 29,107 residents.

Before you act on this

Orleans Parish, LA carries this site's most-constrained reading. Berrien County, GA and Cannon County, TN 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 Roane County, TN and Davidson County, TN. The full underlying dataset is downloadable directly, one row per county.