West Baton Rouge Parish, LA Shrink-Swell Risk
Shrink-swell potential in West Baton Rouge Parish, LA
Very High
Soil across 47.1% of West Baton Rouge Parish, LA comes back "Very High" in USDA's shrink-swell data, averaging 10.25% linear extensibility. Ground that moves this much routinely produces the classic expansive-soil symptoms: diagonal stair-step cracking, doors that stick seasonally, uneven floors. A standard footing is a poor bet here.
What this number does and doesn't tell you
This is a countywide, area-weighted figure across every soil survey map unit in West Baton Rouge Parish, LA - never a reading for one specific parcel. A local geotechnical report, typically $1,000-$5,000 (around $2,700 typical), is the only way to know what one lot in West Baton Rouge Parish will actually do.
West Baton Rouge Parish: the real numbers
West Baton Rouge Parish's soil reading is exactly the case where a report before construction, or before cracks widen, pays for itself. A geotechnical report runs $1,000-$5,000 (typically $2,700); an actual foundation repair, once cracking sets in, typically runs $5,000-$15,000 (around $10,000 typical) - roughly 4x the report.
West Baton Rouge Parish's rank among Louisiana counties
Among the 3,085 rated counties on this site, West Baton Rouge Parish, LA ranks 24 most-constrained nationally, and 15 of 64 within Louisiana. West Baton Rouge Parish, LA is 192 square miles with a population of 28,425.
Before you act on this
Orleans Parish, LA carries this site's most-constrained reading. Union County, NC and McPherson County, NE are worth a look for comparison.
How this reading is built, and its real limits · The warning signs of expansive-clay damage, explained
Elsewhere in Louisiana
Every county in Louisiana is on this site, including Acadia Parish, LA and Caldwell Parish, LA. The full underlying dataset is downloadable directly, one row per county.