More than ever, residents in Maryland and Virginia are adding to their outdoor living space. Decks, patios, screened enclosures, and outdoor kitchens help make your backyard more comfortable for you, and more inviting for your guests. It also increases the value of your home.Design Builders, Inc. is based in Bethesda MD. Based on geography, we service parts of Fairfax County, Arlington County, Loudoun County, Montgomery County, Howard County, Prince Georges County. We no longer service Washington DC. Please contact us to confirm service to your area.