Glenn County, CA Shrink-Swell Risk

What Glenn County, CA's soil means for a foundation

Moderate

USDA's SSURGO data puts Glenn County, CA's soil at "Moderate" shrink-swell potential, an area-weighted linear extensibility of 4.38% across 35.5% of the county's surveyed land. A real but modest amount of movement - standard foundations usually hold up, but drainage and moisture control around the foundation still matter more than on low-risk soil.

This is a county figure, not a lot figure

USDA's survey covers the whole of Glenn County, CA 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 Glenn County will actually do.

Report cost vs. repair cost

With Glenn County, CA rating "Moderate", 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 Glenn County, CA compares

Nationally, Glenn County, CA is the 416-most-constrained of 3,085 rated counties for shrink-swell soil. Within California alone it ranks 7 of 58. Glenn County covers 1,314 square miles and counts 28,304 residents.

Before you act on this

Orleans Parish, LA carries this site's most-constrained reading. Teton County, ID and Hillsborough County, FL 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 California

Every county in California is on this site, including Mono County, CA and Sacramento County, CA. The full underlying dataset is downloadable directly, one row per county.