Johnson County, GA Shrink-Swell Risk

Shrink-swell potential in Johnson County, GA

Low

Soil across 95.1% of Johnson County, GA comes back "Low" in USDA's shrink-swell data, averaging 1.27% linear extensibility. Among the 3,144 counties on this site, that's the clean result: little shrink-swell movement, standard construction the likely outcome.

What this number does and doesn't tell you

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

Johnson County: the real numbers

Johnson 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, Johnson County, GA ranks 2,729 most-constrained nationally, and 115 of 159 within Georgia. The county spans 303 square miles, home to 9,178 people.

Before you act on this

Orleans Parish, LA carries this site's most-constrained reading. McDowell County, WV and Prowers County, CO 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 Paulding County, GA and Brantley County, GA. The full underlying dataset is downloadable directly, one row per county.