Troup County, GA Shrink-Swell Risk
What Troup County, GA's soil means for a foundation
Low
USDA's SSURGO data puts Troup County, GA's soil at "Low" shrink-swell potential, an area-weighted linear extensibility of 1.6% across 98.9% of the county's surveyed land. Among the 3,144 counties on this site, that's the clean result: little shrink-swell movement, standard construction the likely outcome.
This is a county figure, not a lot figure
USDA's survey covers the whole of Troup County, GA at once, not any single address. A local geotechnical report, typically $1,000-$5,000 (around $2,700 typical), is the only way to know what one lot in Troup County will actually do.
Report cost vs. repair cost
With Troup County, GA rating "Low", a geotechnical report is still worthwhile before a build, just less urgent than in a high-risk county. 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.
How Troup County, GA compares
Nationally, Troup County, GA is the 2,387-most-constrained of 3,085 rated counties for shrink-swell soil. Within Georgia alone it ranks 57 of 159. Troup County covers 414 square miles and counts 71,513 residents.
For contrast
Orleans Parish, LA carries this site's most-constrained reading. Barton County, KS and Saluda County, SC 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
More of Georgia
Every county in Georgia is on this site, including Monroe County, GA and Montgomery County, GA. The full underlying dataset is downloadable directly, one row per county.