Lassen County, CA Shrink-Swell Risk
Lassen County, CA's soil, for shrink-swell risk
Low
Lassen County, CA: USDA's soil survey rates 66.5% of the county "Low" for shrink-swell potential (2.83% 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 Lassen County's reading doesn't cover
Two lots a mile apart in Lassen 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 Lassen County, CA 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 Lassen County, CA compares
Nationally, Lassen County, CA is the 1,324-most-constrained of 3,085 rated counties for shrink-swell soil. Within California alone it ranks 29 of 58. Lassen County, CA is 4,541 square miles with a population of 28,340.
Before you act on this
Orleans Parish, LA carries this site's most-constrained reading. Clermont County, OH and Coffey County, KS 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 Contra Costa County, CA and Kings County, CA. The full underlying dataset is downloadable directly, one row per county.