Grand Isle County, VT Shrink-Swell Risk

What Grand Isle County, VT's soil means for a foundation

Moderate

USDA's SSURGO data puts Grand Isle County, VT's soil at "Moderate" shrink-swell potential, an area-weighted linear extensibility of 3.3% across 69.4% of the county's surveyed land. That's a middle reading: not the sharp swings that crack a foundation outright, but enough that grading and drainage are worth getting right.

This is a county figure, not a lot figure

USDA's survey covers the whole of Grand Isle County, VT at once, not any single address. The real answer for one lot is still a site-specific geotechnical report, running about $1,000-$5,000 (typically near $2,700).

Report cost vs. repair cost

With Grand Isle County, VT 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 Grand Isle County, VT compares

Nationally, Grand Isle County, VT is the 976-most-constrained of 3,085 rated counties for shrink-swell soil. Within Vermont alone it ranks 1 of 14. Grand Isle County, VT is 82 square miles with a population of 7,528.

See how another county compares

Orleans Parish, LA carries this site's most-constrained reading. Dale County, AL and Mitchell 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 Vermont

Every county in Vermont is on this site, including Orange County, VT and Orleans County, VT. The full underlying dataset is downloadable directly, one row per county.