Logan County, OH Shrink-Swell Risk
What Logan County, OH's soil means for a foundation
Moderate
USDA's SSURGO data puts Logan County, OH's soil at "Moderate" shrink-swell potential, an area-weighted linear extensibility of 4.08% across 62.9% of the county's surveyed land. Conventional foundations are the reasonable expectation here, with routine moisture-control practice rather than special engineering.
This is a county figure, not a lot figure
USDA's survey covers the whole of Logan County, OH at once, not any single address. 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 Logan County.
Report cost vs. repair cost
With Logan County, OH rating "Moderate", 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 Logan County, OH compares
Nationally, Logan County, OH is the 530-most-constrained of 3,085 rated counties for shrink-swell soil. Within Ohio alone it ranks 14 of 88. The county spans 459 square miles, home to 46,085 people.
See how another county compares
Orleans Parish, LA carries this site's most-constrained reading. Pasquotank County, NC and McPherson County, NE 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 Huron County, OH and Champaign County, OH. The full underlying dataset is downloadable directly, one row per county.