Lyon County, NV Shrink-Swell Risk
Lyon County, NV's soil, for shrink-swell risk
Low
Lyon County, NV: USDA's soil survey rates 62.7% of the county "Low" for shrink-swell potential (2.76% linear extensibility). That's the easiest starting point on this site's scale - a standard foundation is the reasonable default here, though any one lot can still differ.
What Lyon County's reading doesn't cover
Two lots a mile apart in Lyon 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 Lyon County, NV 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.
Where this sits nationally
Nationally, Lyon County, NV is the 1,368-most-constrained of 3,085 rated counties for shrink-swell soil. Within Nevada alone it ranks 7 of 17. Lyon County covers 2,003 square miles and counts 63,718 residents.
For contrast
Orleans Parish, LA carries this site's most-constrained reading. Shelby County, TX and Indiana County, PA 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 Nevada
Every county in Nevada is on this site, including Storey County, NV and Elko County, NV. The full underlying dataset is downloadable directly, one row per county.