Iredell County, NC Shrink-Swell Risk

What Iredell County, NC's soil means for a foundation

Low

USDA's SSURGO data puts Iredell County, NC's soil at "Low" shrink-swell potential, an area-weighted linear extensibility of 1.78% across 93.1% of the county's surveyed land. That's as favorable a county-level reading as this dataset produces - standard foundation practice, pending one lot's own geotechnical report.

This is a county figure, not a lot figure

USDA's survey covers the whole of Iredell County, NC at once, not any single address. The real answer for one lot is still a site-specific geotechnical report, running about $1,000-$5,000 (typically near $2,700).

Report cost vs. repair cost

With Iredell 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.

How Iredell County, NC compares

Nationally, Iredell County, NC is the 2,185-most-constrained of 3,085 rated counties for shrink-swell soil. Within North Carolina alone it ranks 44 of 100. Iredell County covers 574 square miles and counts 206,361 residents.

See how another county compares

Orleans Parish, LA carries this site's most-constrained reading. Chowan County, NC and Mississippi County, MO 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 Stanly County, NC and Rockingham County, NC. The full underlying dataset is downloadable directly, one row per county.