Perquimans County, NC Shrink-Swell Risk

Perquimans County, NC's soil, for shrink-swell risk

Low

Perquimans County, NC: USDA's soil survey rates 67.8% of the county "Low" for shrink-swell potential (2.3% 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 Perquimans County's reading doesn't cover

Two lots a mile apart in Perquimans County can carry different soil, even though they share one countywide reading. A local geotechnical report, typically $1,000-$5,000 (around $2,700 typical), is the only way to know what one lot in Perquimans County will actually do.

What it costs to find out, versus to ignore it

With Perquimans County, NC 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.

Perquimans County's rank among North Carolina counties

Nationally, Perquimans County, NC is the 1,727-most-constrained of 3,085 rated counties for shrink-swell soil. Within North Carolina alone it ranks 25 of 100. Perquimans County, NC is 247 square miles with a population of 13,460.

For contrast

Orleans Parish, LA carries this site's most-constrained reading. Young County, TX and Leelanau County, MI 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 North Carolina

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