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Knowledgeable Professionals

We’ve spent decades in the business.

Our professionals have an average tenure of a decade.

Most of our employees have been proudly serving our commercial, residential and general contractors for 10 years or more. Our teams are trained to provide excellent customer service and to help you order the right products for your particular application. We take pride in our commitment to staying current on industry trends, new product offerings, and labor saving ideas, and we don’t believe in stupid questions. If we don’t know the answer, we’ll work with our manufacturers to get it for you.

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 19 locations including two yards in Delaware (Dover, Selbyville), eight yards in Maryland (Baltimore, Beltsville, Bladensburg, Forestville, Frederick, Gaithersburg, Hagerstown, Upper Marlboro), one yard in New Jersey (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.