Caribou County, ID Shrink-Swell Risk
Caribou County, ID's soil, for shrink-swell risk
Low
Caribou County, ID: USDA's soil survey rates 85% of the county "Low" for shrink-swell potential (2.07% 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 Caribou County's reading doesn't cover
Two lots a mile apart in Caribou County can carry different soil, even though they share one countywide reading. The real answer for one lot is still a site-specific geotechnical report, running about $1,000-$5,000 (typically near $2,700).
What it costs to find out, versus to ignore it
With Caribou County, ID 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.
How Caribou County, ID compares
Nationally, Caribou County, ID is the 1,922-most-constrained of 3,085 rated counties for shrink-swell soil. Within Idaho alone it ranks 22 of 44. The county spans 1,764 square miles, home to 7,239 people.
See how another county compares
Orleans Parish, LA carries this site's most-constrained reading. Crawford County, PA and Whiteside County, IL 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 Idaho
Every county in Idaho is on this site, including Nez Perce County, ID and Washington County, ID. The full underlying dataset is downloadable directly, one row per county.