Realty 1 109 Centerway, Greenbelt, MD20770 Realty 1 is located in the Roosevelt Center in Old Greenbelt and has been in business since 1986. The company buys and…More sells houses, townhouses and condominiums in the area. Its agents will work to get the most bang for your buck, whether you're in the market or your house is on the market. One of the newest services offer is a texting service in which you can text GREENBELT to 88000 and an agent will respond as soon as possible. You can also visit Realty 1's website and search its vast library of homes currently for sale.