Greenwood County, SC Shrink-Swell Risk

Greenwood County, SC's soil, for shrink-swell risk

Low

Greenwood County, SC: USDA's soil survey rates 76.8% of the county "Low" for shrink-swell potential (2.47% linear extensibility). That's as favorable a county-level reading as this dataset produces - standard foundation practice, pending one lot's own geotechnical report.

What Greenwood County's reading doesn't cover

Two lots a mile apart in Greenwood County can carry different soil, even though they share one countywide reading. 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 Greenwood County.

What it costs to find out, versus to ignore it

With Greenwood County, SC 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.

Where this sits nationally

Nationally, Greenwood County, SC is the 1,585-most-constrained of 3,085 rated counties for shrink-swell soil. Within South Carolina alone it ranks 8 of 46. Greenwood County, SC is 456 square miles with a population of 70,041.

Before you act on this

Orleans Parish, LA carries this site's most-constrained reading. Silver Bow County, MT and Perry County, IL 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 South Carolina

Every county in South Carolina is on this site, including Dillon County, SC and Abbeville County, SC. The full underlying dataset is downloadable directly, one row per county.