San Bernardino County, CA Shrink-Swell Risk
San Bernardino County's SSURGO shrink-swell reading
Low
In San Bernardino County, CA, 83.7% of the surveyed soil carries a "Low" shrink-swell rating, 1.93% linear extensibility on average. That's as favorable a county-level reading as this dataset produces - standard foundation practice, pending one lot's own geotechnical report.
Before you rely on this for one address
San Bernardino County's reading is an average across the whole county, not a promise about any one lot inside it. 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 San Bernardino County.
Budgeting for San Bernardino County, CA
San Bernardino 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, San Bernardino County, CA ranks 2,047 most-constrained nationally, and 50 of 58 within California. San Bernardino County covers 20,068 square miles and counts 2,214,281 residents.
See how another county compares
Orleans Parish, LA carries this site's most-constrained reading. Dallas County, MO and Osceola County, MI 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 California
Every county in California is on this site, including Santa Barbara County, CA and Mariposa County, CA. The full underlying dataset is downloadable directly, one row per county.