Carroll County, MD Shrink-Swell Risk

Carroll County, MD's soil, for shrink-swell risk

Low

Carroll County, MD: USDA's soil survey rates 99.1% of the county "Low" for shrink-swell potential (1.37% linear extensibility). Among the 3,144 counties on this site, that's the clean result: little shrink-swell movement, standard construction the likely outcome.

What Carroll County's reading doesn't cover

Two lots a mile apart in Carroll County can carry different soil, even though they share one countywide reading. A local geotechnical report, typically $1,000-$5,000 (around $2,700 typical), is the only way to know what one lot in Carroll County will actually do.

What it costs to find out, versus to ignore it

With Carroll County, MD rating "Low", a geotechnical report is still worthwhile before a build, just less urgent than in a high-risk county. 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

Nationally, Carroll County, MD is the 2,634-most-constrained of 3,085 rated counties for shrink-swell soil. Within Maryland alone it ranks 14 of 24. The county spans 448 square miles, home to 177,108 people.

For contrast

Orleans Parish, LA carries this site's most-constrained reading. Charlotte County, FL and Suffolk city, VA 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

More of Maryland

Every county in Maryland is on this site, including Frederick County, MD and Baltimore city, MD. The full underlying dataset is downloadable directly, one row per county.