Irwin County, GA Shrink-Swell Risk

Shrink-swell potential in Irwin County, GA

Low

Soil across 94.5% of Irwin County, GA comes back "Low" in USDA's shrink-swell data, averaging 0.98% 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 Irwin County, GA - 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).

Irwin County: the real numbers

Irwin 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, Irwin County, GA ranks 2,906 most-constrained nationally, and 142 of 159 within Georgia. The county spans 354 square miles, home to 9,155 people.

Before you act on this

Orleans Parish, LA carries this site's most-constrained reading. Fayette County, TN and Bertie 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 Pike County, GA and Coweta County, GA. The full underlying dataset is downloadable directly, one row per county.