Limestone County, AL Shrink-Swell Risk
Shrink-swell potential in Limestone County, AL
Low
Soil across 81.7% of Limestone County, AL comes back "Low" in USDA's shrink-swell data, averaging 1.95% linear extensibility. That's the easiest starting point on this site's scale - a standard foundation is the reasonable default here, though any one lot can still differ.
What this number does and doesn't tell you
This is a countywide, area-weighted figure across every soil survey map unit in Limestone County, AL - 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).
Limestone County: the real numbers
Limestone 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.
Where this sits nationally
Among the 3,085 rated counties on this site, Limestone County, AL ranks 2,024 most-constrained nationally, and 30 of 67 within Alabama. The county spans 563 square miles, home to 118,942 people.
Before you act on this
Orleans Parish, LA carries this site's most-constrained reading. Kerr County, TX and Whitley County, KY 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 Autauga County, AL and Lowndes County, AL. The full underlying dataset is downloadable directly, one row per county.