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Our Company, Your Advantage

Customer service is our number one priority.

Builders across MD, DE, VA, PA, and D.C. trust CBSI

Capitol Building Supply (CBSI), a GMS company, has twenty convenient yard locations throughout Delaware, Maryland, Virginia, Pennsylvania, and the Washington, D.C. metro area. For years, builders, contractors, construction professionals and homeowners across the Mid-Atlantic region have turned to CBSI for the quality building materials they require.

Through our partnership with the industry’s leading construction product brands, our network of yards, and our reliable delivery service, we’re able to honor our pledge to get the right products to customers as quickly and safely as possible.

Our People

Many of our employees have been working with Capitol Building Supply for over 10 years. Several started their careers with CBSI in delivery and warehouse positions, and later advanced into management. This is a testament to the great culture and work environment that CBSI provides. We really define our employees as “family” and truly care about the health and welfare of everyone who works for us.

All of Capitol Building Supply’s employees pride themselves in being hard-working, safe, and professional in their key roles. They are the backbone of our success as a company.

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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.