Douglas County, WI Shrink-Swell Risk
Shrink-swell potential in Douglas County, WI
Low
Soil across 75.1% of Douglas County, WI comes back "Low" in USDA's shrink-swell data, averaging 2.78% 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 this number does and doesn't tell you
This is a countywide, area-weighted figure across every soil survey map unit in Douglas County, WI - never a reading for one specific parcel. The real answer for one lot is still a site-specific geotechnical report, running about $1,000-$5,000 (typically near $2,700).
Douglas County: the real numbers
Douglas County's soil reading points toward standard foundation practice as the likely outcome, not the exception. 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
Among the 3,085 rated counties on this site, Douglas County, WI ranks 1,359 most-constrained nationally, and 19 of 72 within Wisconsin. The county spans 1,304 square miles, home to 44,276 people.
Before you act on this
Orleans Parish, LA carries this site's most-constrained reading. Wayne County, PA and Powell County, MT 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
Elsewhere in Wisconsin
Every county in Wisconsin is on this site, including Iron County, WI and Pierce County, WI. The full underlying dataset is downloadable directly, one row per county.