About Us: LONG & FOSTER REAL ESTATE , INC. Bethesda Gateway Office 4650 East-West Highway Bethesda, MD 20814   Serving the Montgomery County communities of Bethesda, Potomac, Rockville, Chevy Chase, Cabin John, Glen Echo, Kensington, Garrett Park, North Potomac, Gaithersburg, Germantown and Darnestown.  Whether you are moving to a new community, or just moving down the street, a first-time homebuyer, moving up or scaling down, we can help!  As the #1 privately owned real estate company in Maryland, buyers and sellers turn to Long & Foster with