Door County, WI Shrink-Swell Risk
What Door County, WI's soil means for a foundation
Low
USDA's SSURGO data puts Door County, WI's soil at "Low" shrink-swell potential, an area-weighted linear extensibility of 1.74% across 88.4% 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 Door County, WI 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 Door County will actually do.
Report cost vs. repair cost
With Door County, WI 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, Door County, WI is the 2,231-most-constrained of 3,085 rated counties for shrink-swell soil. Within Wisconsin alone it ranks 38 of 72. The county spans 482 square miles, home to 30,512 people.
See how another county compares
Orleans Parish, LA carries this site's most-constrained reading. Bacon County, GA and Linn County, OR 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 Wisconsin
Every county in Wisconsin is on this site, including Florence County, WI and Douglas County, WI. The full underlying dataset is downloadable directly, one row per county.