Southern Maryland Homes Address: 42279 Brook Manor Rd, Mechanicsville, MD 20659 Phone: (301) 373-3000 Buildings-Pre-Cut Prefabricated/Modular Other Businesses: Southern MD Used Car Parts at RR 235, Mechanicsville, MD 20659 Terrell Construction at 39468 Golden Beach Rd, Mechanicsville, MD 20659 Big Dogs Paradise at 28765 Three Notch Rd, Mechanicsville, MD 20659