King William County, VA Shrink-Swell Risk

King William County, VA's soil, for shrink-swell risk

Low

King William County, VA: USDA's soil survey rates 93.3% of the county "Low" for shrink-swell potential (2.06% 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 King William County's reading doesn't cover

Two lots a mile apart in King William County can carry different soil, even though they share one countywide reading. A local geotechnical report, typically $1,000-$5,000 (around $2,700 typical), is the only way to know what one lot in King William County will actually do.

What it costs to find out, versus to ignore it

With King William County, VA 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 King William County, VA compares

Nationally, King William County, VA is the 1,932-most-constrained of 3,085 rated counties for shrink-swell soil. Within Virginia alone it ranks 74 of 114. King William County covers 274 square miles and counts 19,232 residents.

For contrast

Orleans Parish, LA carries this site's most-constrained reading. Shiawassee County, MI and Meade 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 Virginia

Every county in Virginia is on this site, including Martinsville city, VA and Franklin County, VA. The full underlying dataset is downloadable directly, one row per county.