Northampton County, NC Shrink-Swell Risk
Shrink-swell potential in Northampton County, NC
Low
Soil across 56.5% of Northampton County, NC comes back "Low" in USDA's shrink-swell data, averaging 2.52% 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 this number does and doesn't tell you
This is a countywide, area-weighted figure across every soil survey map unit in Northampton County, NC - never a reading for one specific parcel. A local geotechnical report, typically $1,000-$5,000 (around $2,700 typical), is the only way to know what one lot in Northampton County will actually do.
Northampton County: the real numbers
Northampton 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 Northampton County, NC compares
Among the 3,085 rated counties on this site, Northampton County, NC ranks 1,551 most-constrained nationally, and 19 of 100 within North Carolina. The county spans 537 square miles, home to 16,580 people.
Before you act on this
Orleans Parish, LA carries this site's most-constrained reading. St. Francois County, MO and Stanley County, SD 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 Stanly County, NC and Columbus County, NC. The full underlying dataset is downloadable directly, one row per county.