Winn Parish, LA Shrink-Swell Risk

Winn Parish, LA's soil, for shrink-swell risk

Moderate

Winn Parish, LA: USDA's soil survey rates 57.8% of the county "Moderate" for shrink-swell potential (3.08% linear extensibility). A real but modest amount of movement - standard foundations usually hold up, but drainage and moisture control around the foundation still matter more than on low-risk soil.

What Winn Parish's reading doesn't cover

Two lots a mile apart in Winn Parish 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 Winn Parish will actually do.

What it costs to find out, versus to ignore it

With Winn Parish, LA 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.

Where this sits nationally

Nationally, Winn Parish, LA is the 1,132-most-constrained of 3,085 rated counties for shrink-swell soil. Within Louisiana alone it ranks 49 of 64. Winn Parish, LA is 950 square miles with a population of 13,405.

Before you act on this

Orleans Parish, LA carries this site's most-constrained reading. Walsh County, ND and Sullivan County, NY 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 Louisiana

Every county in Louisiana is on this site, including Jefferson Parish, LA and West Feliciana Parish, LA. The full underlying dataset is downloadable directly, one row per county.