Barnwell County, SC Shrink-Swell Risk

Barnwell County's SSURGO shrink-swell reading

Low

In Barnwell County, SC, 99.7% of the surveyed soil carries a "Low" shrink-swell rating, 1.03% linear extensibility on average. That's as favorable a county-level reading as this dataset produces - standard foundation practice, pending one lot's own geotechnical report.

Before you rely on this for one address

Barnwell County's reading is an average across the whole county, not a promise about any one lot inside it. 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 Barnwell County.

Budgeting for Barnwell County, SC

Barnwell 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.

How Barnwell County, SC compares

Among the 3,085 rated counties on this site, Barnwell County, SC ranks 2,882 most-constrained nationally, and 44 of 46 within South Carolina. The county spans 548 square miles, home to 20,495 people.

See how another county compares

Orleans Parish, LA carries this site's most-constrained reading. Mississippi County, MO and Perry County, IN 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 South Carolina

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