St. Mary's County, MD Shrink-Swell Risk

St. Mary's County's SSURGO shrink-swell reading

Low

In St. Mary's County, MD, 96.1% of the surveyed soil carries a "Low" shrink-swell rating, 1.37% linear extensibility on average. Among the 3,144 counties on this site, that's the clean result: little shrink-swell movement, standard construction the likely outcome.

Before you rely on this for one address

St. Mary's County's reading is an average across the whole county, not a promise about any one lot inside it. The real answer for one lot is still a site-specific geotechnical report, running about $1,000-$5,000 (typically near $2,700).

Budgeting for St. Mary's County, MD

St. Mary's 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 St. Mary's County, MD compares

Among the 3,085 rated counties on this site, St. Mary's County, MD ranks 2,635 most-constrained nationally, and 15 of 24 within Maryland. The county spans 359 square miles, home to 116,469 people.

See how another county compares

Orleans Parish, LA carries this site's most-constrained reading. Langlade County, WI and Greene County, OH 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 Maryland

Every county in Maryland is on this site, including Prince George's County, MD and Anne Arundel County, MD. The full underlying dataset is downloadable directly, one row per county.