Perry County, AL Shrink-Swell Risk

Shrink-swell potential in Perry County, AL

Moderate

Soil across 73.4% of Perry County, AL comes back "Moderate" in USDA's shrink-swell data, averaging 3.87% linear extensibility. That's a middle reading: not the sharp swings that crack a foundation outright, but enough that grading and drainage are worth getting right.

What this number does and doesn't tell you

This is a countywide, area-weighted figure across every soil survey map unit in Perry County, AL - never a reading for one specific parcel. A site-specific soil report, usually $1,000-$5,000, is what an engineer would actually pull before designing a foundation on a lot in Perry County.

Perry County: the real numbers

Perry County'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.

How Perry County, AL compares

Among the 3,085 rated counties on this site, Perry County, AL ranks 642 most-constrained nationally, and 7 of 67 within Alabama. Perry County, AL is 720 square miles with a population of 7,719.

For contrast

Orleans Parish, LA carries this site's most-constrained reading. Randolph County, IN and Kent County, MI 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 Alabama

Every county in Alabama is on this site, including Henry County, AL and Dale County, AL. The full underlying dataset is downloadable directly, one row per county.