Iberville Parish, LA Shrink-Swell Risk

What Iberville Parish, LA's soil means for a foundation

Very High

USDA's SSURGO data puts Iberville Parish, LA's soil at "Very High" shrink-swell potential, an area-weighted linear extensibility of 12.68% across 69.2% of the county's surveyed land. This is the reading most likely to explain cracking a homeowner is already seeing. An engineered foundation design, not a conventional footing, is the realistic expectation for new construction.

This is a county figure, not a lot figure

USDA's survey covers the whole of Iberville Parish, LA 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 Iberville Parish, LA rating "Very High", the gap between finding out early and finding out late is the whole decision. The report ($1,000-$5,000) is what tells you whether Iberville Parish's county-level reading applies to your lot; the repair ($5,000-$15,000) is what it costs if you skip that and find out from the cracks instead.

How Iberville Parish, LA compares

Nationally, Iberville Parish, LA is the 5-most-constrained of 3,085 rated counties for shrink-swell soil. Within Louisiana alone it ranks 4 of 64. The county spans 617 square miles, home to 29,766 people.

For contrast

Orleans Parish, LA carries this site's most-constrained reading. Hancock County, KY and Greenwood County, KS are worth a look for comparison.

How this reading is built, and its real limits · The warning signs of expansive-clay damage, explained

More of Louisiana

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