Greene County, NC Shrink-Swell Risk
Shrink-swell potential in Greene County, NC
Low
Soil across 98.5% of Greene County, NC comes back "Low" in USDA's shrink-swell data, averaging 1.3% 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 this number does and doesn't tell you
This is a countywide, area-weighted figure across every soil survey map unit in Greene County, NC - never a reading for one specific parcel. 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 Greene County.
Greene County: the real numbers
Greene 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.
Greene County's rank among North Carolina counties
Among the 3,085 rated counties on this site, Greene County, NC ranks 2,704 most-constrained nationally, and 92 of 100 within North Carolina. Greene County, NC is 267 square miles with a population of 20,671.
For contrast
Orleans Parish, LA carries this site's most-constrained reading. Kent County, MD and Kiowa County, CO 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 Haywood County, NC and Stokes County, NC. The full underlying dataset is downloadable directly, one row per county.