Union County, GA Shrink-Swell Risk

Shrink-swell potential in Union County, GA

Low

Soil across 100% of Union County, GA comes back "Low" in USDA's shrink-swell data, averaging 1.3% 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 Union County, GA - 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 Union County.

Union County: the real numbers

Union 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, Union County, GA ranks 2,700 most-constrained nationally, and 108 of 159 within Georgia. Union County, GA is 324 square miles with a population of 27,601.

For contrast

Orleans Parish, LA carries this site's most-constrained reading. Taylor County, IA and Pitt County, NC 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 Georgia

Every county in Georgia is on this site, including Charlton County, GA and Catoosa County, GA. The full underlying dataset is downloadable directly, one row per county.