Fulton County, GA Shrink-Swell Risk
What Fulton County, GA's soil means for a foundation
Low
USDA's SSURGO data puts Fulton County, GA's soil at "Low" shrink-swell potential, an area-weighted linear extensibility of 1.51% across 99.8% of the county's surveyed land. 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.
This is a county figure, not a lot figure
USDA's survey covers the whole of Fulton 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 Fulton County will actually do.
Report cost vs. repair cost
With Fulton 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 Fulton County, GA compares
Nationally, Fulton County, GA is the 2,477-most-constrained of 3,085 rated counties for shrink-swell soil. Within Georgia alone it ranks 76 of 159. Fulton County covers 527 square miles and counts 1,090,354 residents.
For contrast
Orleans Parish, LA carries this site's most-constrained reading. Brooke County, WV and Sioux County, IA 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 Pike County, GA and DeKalb County, GA. The full underlying dataset is downloadable directly, one row per county.