The Severn Group is the premier commercial contracting company in the D.C, Maryland, and Northern Virginia area. Call us today for commercial plumbing or HVAC work. If you are looking for a commercial HVAC or plumbing contractor in Anne Arundel County, Maryland, Washington D.C. Or Baltimore, Maryland. Choose us at The Severn Group today. We specialize in chillers, cooling towers, boilers, gas systems and servicing Phone: (410) 571-4500