person Your Account Find a Yard Resources Now Hiring! All arrow_drop_down search PRODUCTS keyboard_arrow_down Home Page Our Yard Locations About Us Our Company Articles Services Products & Brands Project Gallery Yards Dover, DE New Castle, DE Selbyville, DE Baltimore, MD (Quad Ave) Beltsville, MD Bladensburg, MD Frederick, MD Gaithersburg, MD Hagerstown, MD Upper Marlboro, MD Atlantic City, NJ (Egg Harbor Township) Camden, NJ Harrisburg, PA Fredericksburg, VA Manassas Park, VA Marshall, VA Springfield, VA Vienna, VA Winchester, VA Washington, D.C. Capitol Building Materials, Inc. (CBSI) Yards Construction supplies in Delaware, Maryland, New Jersey, Pennsylvania, Virginia and Washington, D.C. As part of the GMS family of companies, CBSI is a trusted partner of residential and commercial building professionals in DE, MD, NJ, PA, VA and Washington, D.C. We provide expert product and industry knowledge, and exceptional customer service from our local construction yards in: Delaware Dover | New Castle | Selbyville Maryland Baltimore | Beltsville | Bladensburg | Frederick | Gaithersburg | Hagerstown | Upper Marlboro New Jersey Atlantic City | Camden Pennsylvania Harrisburg Virginia Manassas Park | Marshall | Springfield | Stafford | Vienna | Winchester Washington, D.C. Yards in District of Columbia Washington, D.C. 2300 T Street NE Washington, DC 20002 PH: 202-554-9191 Hours: M-F 5AM-4PM Sat 7AM-12PM Yards in Delaware Dover, DE 5119 N. DuPont Hwy. Dover, DE 19901 PH: 302-678-4601 FX: 302-678-8034 Hours: M-F 6AM-4PM New Castle, DE 3025 Bowlarama Dr. New Castle, DE 19720 PH: 302-501-6020 FX: 302-561-9640 Hours: M-F 6:30AM-4PM Selbyville, DE 36652 DuPont Blvd. Selbyville, DE 19975 PH: 302-436-8624 FX: 302-436-8631 Hours: M-F 6:30AM-4PM Yards in Maryland Baltimore, MD - Quad Ave 6813 Quad Ave. Baltimore, MD 21237 PH: 410-284-2800 FX: 410-284-2899 Hours: M-F 6AM-4PM Sat 7AM-12PM Beltsville, MD 12340 Conway Rd. Beltsville, MD 20705 PH: 301-937-6366 FX: 301-937-8710 Hours: M-F 6AM-4PM Sat 7AM-12PM Bladensburg, MD 4501 46th St. Bladensburg, MD 20710 PH: 240-764-1236 FX: 240-764-1235 Hours: M-F 6AM-4PM Sat 7AM-12PM Frederick, MD 8006 Reichs Ford Rd. Frederick, MD 21704 PH: 240-436-3500 Hours: M-F 5AM-4PM Sat 7AM-12PM Gaithersburg, MD 7870 Beechcraft Ave. Gaithersburg, MD 20879 PH: 301-921-9207 FX: 301-927-9446 Hours: M-F 6AM-4PM Sat 7AM-12PM Hagerstown, MD 1225 Maryland Ave. Hagerstown, MD 21740 PH: 301-739-3090 FX: 301-739-1021 Hours: M-F 6AM-4PM Sat 7AM-12PM Upper Marlboro, MD 7811 Penn-Western Ct. Upper Marlboro, MD 20772 PH: 240-455-0319 Hours: M-F 6AM-4PM Sat 7AM-12PM Yards in New Jersey Atlantic City, NJ 3173 Fire Rd. Egg Harbor Township, NJ 08234 PH: 609-646-9350 Hours: M-F 7AM-4PM Sat 7AM-12PM Camden, NJ 201 Erie St. Camden, NJ 08102 PH: 856-576-6964 FX: 856-576-6971 Hours: M-F 7AM-4PM Sat 7AM-12PM Yards in Pennsylvania Harrisburg, PA 1001 Herr St. Harrisburg, PA 17103 PH: 717-614-8954 FX: 717-996-3165 Hours: M-F 7AM-4PM Yards in Virginia Manassas Park, VA 8429 Euclid Ave. Manassas Park, VA 20111 PH: 703-631-6633 Hours: M-F 6AM-4PM Sat 7AM-12PM Marshall, VA 7595 Capitol Way Marshall, VA 20115 PH: 540-364-1202 Hours: M-F 6AM-4PM Sat 7AM-12PM Springfield, VA 7622 Backlick Rd. Springfield, VA 22150 PH: 703-644-6970 Hours: M-F 4:30AM-4PM Sat 6AM-12PM Stafford, VA 16 Baron Park Rd. Fredricksburg, VA 22405 PH: 540-368-6678 Hours: M-F 6:30AM-4PM Vienna, VA 431 Mill St. NE Vienna, VA 22180 PH: 703-281-5151 FX: 703-281-4414 Hours: M-F 5AM-4PM Sat 6AM-12PM Winchester, VA 195 Lenoir Dr. Winchester, VA 22603 PH: 540-662-9142 FX: 540-722-2136 Hours: M-F 6AM-4PM Sat 7AM-12PM Need to talk to an expert to help with your next project? Experienced and helpful customer service representatives are standing by ready to help. call CONTACT US About Us Teaming up with the top brands in the industry, we have one simple pledge: to get the right products into our customers' hands as quickly and safely as possible. Our Services Capitol Building Supply carries a full range of commercial and residential construction supplies, and our crews are fully trained to deliver to all sites. Our Locations Our delivery fleet is dispatched from 20 locations including three yards in Delaware (Dover, New Castle, Selbyville), seven yards in Maryland (Baltimore, Beltsville, Bladensburg, Frederick, Gaithersburg, Hagerstown, Upper Marlboro), two yards in New Jersey (Atlantic City, Camden), one yard in Pennsylvania (Harrisburg), six yards in Virginia (Manassas, Marshall, Springfield, Stafford, Vienna, Winchester), and one yard in Washington, D.C. Contact Us For more information about how to contact us, visit our Find a Yard page. Or, click the Contact Us tab to send us an email. Copyright © 2021 Capitol Building Supply, Inc. - All Rights Reserved | Terms of Use | Privacy Policy | California's Proposition 65 | Accessibility Statement Capitol Building Supply, Inc. Department # 34792, Alexandria VA, 22334-0792 US