Duplin County, NC Shrink-Swell Risk

Duplin County's SSURGO shrink-swell reading

Low

In Duplin County, NC, 99.9% of the surveyed soil carries a "Low" shrink-swell rating, 1.38% 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

Duplin County's reading is an average across the whole county, not a promise about any one lot inside it. A local geotechnical report, typically $1,000-$5,000 (around $2,700 typical), is the only way to know what one lot in Duplin County will actually do.

Budgeting for Duplin County, NC

Duplin 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 Duplin County, NC compares

Among the 3,085 rated counties on this site, Duplin County, NC ranks 2,628 most-constrained nationally, and 85 of 100 within North Carolina. Duplin County covers 815 square miles and counts 50,539 residents.

For contrast

Orleans Parish, LA carries this site's most-constrained reading. Essex County, NJ and Grundy 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

Elsewhere in North Carolina

Every county in North Carolina is on this site, including Franklin County, NC and Buncombe County, NC. The full underlying dataset is downloadable directly, one row per county.