St. Charles offers affordable, quality constructed homes from two nationally recognized homebuilders. Discover why St. Charles is Southern Maryland’s best-selling community. Located just 11 miles south of the Capital Beltway, St. Charles offers new homes and townhomes as well as spacious apartments to fit every budget. Love where you live - that's why CNN Money Magazine named St. Charles one of America’s best places to live and why we're named one of the top 50 master planned communities.