Florence County, SC Shrink-Swell Risk

Florence County, SC's soil, for shrink-swell risk

Low

Florence County, SC: USDA's soil survey rates 92.6% of the county "Low" for shrink-swell potential (1.53% linear extensibility). 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.

What Florence County's reading doesn't cover

Two lots a mile apart in Florence County can carry different soil, even though they share one countywide reading. The real answer for one lot is still a site-specific geotechnical report, running about $1,000-$5,000 (typically near $2,700).

What it costs to find out, versus to ignore it

With Florence County, SC 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 Florence County, SC compares

Nationally, Florence County, SC is the 2,460-most-constrained of 3,085 rated counties for shrink-swell soil. Within South Carolina alone it ranks 36 of 46. Florence County covers 800 square miles and counts 138,049 residents.

Before you act on this

Orleans Parish, LA carries this site's most-constrained reading. Walworth County, WI and La Salle County, TX 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 South Carolina

Every county in South Carolina is on this site, including Marion County, SC and Marlboro County, SC. The full underlying dataset is downloadable directly, one row per county.