Canyon County, ID Shrink-Swell Risk

Shrink-swell potential in Canyon County, ID

Low

Soil across 89.4% of Canyon County, ID comes back "Low" in USDA's shrink-swell data, averaging 1.86% linear extensibility. That's as favorable a county-level reading as this dataset produces - standard foundation practice, pending one lot's own geotechnical report.

What this number does and doesn't tell you

This is a countywide, area-weighted figure across every soil survey map unit in Canyon County, ID - never a reading for one specific parcel. A site-specific soil report, usually $1,000-$5,000, is what an engineer would actually pull before designing a foundation on a lot in Canyon County.

Canyon County: the real numbers

Canyon 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.

Canyon County's rank among Idaho counties

Among the 3,085 rated counties on this site, Canyon County, ID ranks 2,115 most-constrained nationally, and 30 of 44 within Idaho. Canyon County, ID is 587 square miles with a population of 266,892.

See how another county compares

Orleans Parish, LA carries this site's most-constrained reading. Henry County, KY and Hyde County, NC 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 Caribou County, ID and Valley County, ID. The full underlying dataset is downloadable directly, one row per county.