Assumption Parish, LA Shrink-Swell Risk

Shrink-swell potential in Assumption Parish, LA

Very High

Soil across 73.2% of Assumption Parish, LA comes back "Very High" in USDA's shrink-swell data, averaging 12.33% linear extensibility. 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.

What this number does and doesn't tell you

This is a countywide, area-weighted figure across every soil survey map unit in Assumption 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 Assumption Parish will actually do.

Assumption Parish: the real numbers

Assumption 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.

Where this sits nationally

Among the 3,085 rated counties on this site, Assumption Parish, LA ranks 8 most-constrained nationally, and 6 of 64 within Louisiana. Assumption Parish, LA is 344 square miles with a population of 20,050.

For contrast

Orleans Parish, LA carries this site's most-constrained reading. Cumberland County, KY and Ida County, IA 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 Iberville Parish, LA and Ouachita Parish, LA. The full underlying dataset is downloadable directly, one row per county.