Montgomery County, TN Shrink-Swell Risk

Shrink-swell potential in Montgomery County, TN

Low

Soil across 88.9% of Montgomery County, TN comes back "Low" in USDA's shrink-swell data, averaging 2.25% 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 Montgomery 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).

Montgomery County: the real numbers

Montgomery 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.

Montgomery County's rank among Tennessee counties

Among the 3,085 rated counties on this site, Montgomery County, TN ranks 1,750 most-constrained nationally, and 36 of 95 within Tennessee. Montgomery County covers 539 square miles and counts 246,025 residents.

For contrast

Orleans Parish, LA carries this site's most-constrained reading. Davidson County, NC and Liberty County, TX 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 Crockett County, TN and Carroll County, TN. The full underlying dataset is downloadable directly, one row per county.