What Makes Our Team of Virginia Real Estate Experts So Extraordinary? Unprecedented industry knowledge and experience. Your home, next to your family and health, is your most important asset. Trust the buying and selling of your home real estate in Great Falls, Mclean, Oakton, & Vienna to the leading team of realtors in Northern Virginia, Casey Margenau Fine Homes & Estates. Our handpicked team of real estate professionals provides concierge realty services and a seamless, stress-free process for the best possible new home buying experience. We provide knowledge, experience on houses for sale, and true peace of mind for you and your family when selling or buying your perfect homes for sale in McLean VA.