Columbiana County, OH Shrink-Swell Risk
Columbiana County, OH's soil, for shrink-swell risk
Low
Columbiana County, OH: USDA's soil survey rates 83.5% of the county "Low" for shrink-swell potential (1.79% 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 Columbiana County's reading doesn't cover
Two lots a mile apart in Columbiana County can carry different soil, even though they share one countywide reading. A local geotechnical report, typically $1,000-$5,000 (around $2,700 typical), is the only way to know what one lot in Columbiana County will actually do.
What it costs to find out, versus to ignore it
With Columbiana County, OH 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.
Where this sits nationally
Nationally, Columbiana County, OH is the 2,176-most-constrained of 3,085 rated counties for shrink-swell soil. Within Ohio alone it ranks 88 of 88. The county spans 532 square miles, home to 99,823 people.
For contrast
Orleans Parish, LA carries this site's most-constrained reading. Fluvanna County, VA and Buffalo 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
More of Ohio
Every county in Ohio is on this site, including Clark County, OH and Fulton County, OH. The full underlying dataset is downloadable directly, one row per county.