Perry County, KY Shrink-Swell Risk
What Perry County, KY's soil means for a foundation
Low
USDA's SSURGO data puts Perry County, KY's soil at "Low" shrink-swell potential, an area-weighted linear extensibility of 1.05% across 97.6% of the county's surveyed land. 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.
This is a county figure, not a lot figure
USDA's survey covers the whole of Perry County, KY at once, not any single address. A local geotechnical report, typically $1,000-$5,000 (around $2,700 typical), is the only way to know what one lot in Perry County will actually do.
Report cost vs. repair cost
With Perry County, KY 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.
Perry County's rank among Kentucky counties
Nationally, Perry County, KY is the 2,872-most-constrained of 3,085 rated counties for shrink-swell soil. Within Kentucky alone it ranks 117 of 120. Perry County, KY is 340 square miles with a population of 26,739.
See how another county compares
Orleans Parish, LA carries this site's most-constrained reading. Dunn County, WI and Coke 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 Kentucky
Every county in Kentucky is on this site, including Logan County, KY and Breathitt County, KY. The full underlying dataset is downloadable directly, one row per county.