Jackson Parish, LA Shrink-Swell Risk

Shrink-swell potential in Jackson Parish, LA

Low

Soil across 55.1% of Jackson Parish, LA comes back "Low" in USDA's shrink-swell data, averaging 2.73% linear extensibility. That's as favorable a county-level reading as this dataset produces - standard foundation practice, pending one lot's own geotechnical report.

What this number does and doesn't tell you

This is a countywide, area-weighted figure across every soil survey map unit in Jackson Parish, LA - never a reading for one specific parcel. The real answer for one lot is still a site-specific geotechnical report, running about $1,000-$5,000 (typically near $2,700).

Jackson Parish: the real numbers

Jackson Parish's soil reading points toward standard foundation practice as the likely outcome, not the exception. 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.

Jackson Parish's rank among Louisiana counties

Among the 3,085 rated counties on this site, Jackson Parish, LA ranks 1,390 most-constrained nationally, and 55 of 64 within Louisiana. Jackson Parish, LA is 570 square miles with a population of 14,797.

For contrast

Orleans Parish, LA carries this site's most-constrained reading. Alpena County, MI and Monroe County, IL 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

Elsewhere in Louisiana

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