Polk County, NC Shrink-Swell Risk

Polk County's SSURGO shrink-swell reading

Low

In Polk County, NC, 98.2% of the surveyed soil carries a "Low" shrink-swell rating, 1.49% linear extensibility on average. That's the easiest starting point on this site's scale - a standard foundation is the reasonable default here, though any one lot can still differ.

Before you rely on this for one address

Polk 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 Polk County will actually do.

Budgeting for Polk County, NC

Polk 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.

Polk County's rank among North Carolina counties

Among the 3,085 rated counties on this site, Polk County, NC ranks 2,526 most-constrained nationally, and 74 of 100 within North Carolina. Polk County, NC is 238 square miles with a population of 20,320.

Before you act on this

Orleans Parish, LA carries this site's most-constrained reading. Garza County, TX and Red Lake County, MN 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 Lincoln County, NC and Wake County, NC. The full underlying dataset is downloadable directly, one row per county.