Bonner County, ID Shrink-Swell Risk

Shrink-swell potential in Bonner County, ID

Low

Soil across 97.3% of Bonner County, ID comes back "Low" in USDA's shrink-swell data, averaging 1.46% linear extensibility. Among the 3,144 counties on this site, that's the clean result: little shrink-swell movement, standard construction the likely outcome.

What this number does and doesn't tell you

This is a countywide, area-weighted figure across every soil survey map unit in Bonner County, ID - never a reading for one specific parcel. A local geotechnical report, typically $1,000-$5,000 (around $2,700 typical), is the only way to know what one lot in Bonner County will actually do.

Bonner County: the real numbers

Bonner 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.

Bonner County's rank among Idaho counties

Among the 3,085 rated counties on this site, Bonner County, ID ranks 2,554 most-constrained nationally, and 40 of 44 within Idaho. The county spans 1,733 square miles, home to 53,955 people.

Before you act on this

Orleans Parish, LA carries this site's most-constrained reading. Jefferson County, OR and Harris 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

Elsewhere in Idaho

Every county in Idaho is on this site, including Oneida County, ID and Clearwater County, ID. The full underlying dataset is downloadable directly, one row per county.