Welcome to 908 Walker Road-designed by award-winning architect James McDonald, this exceptional custom home blends refined finishes with dramatic architectural detail. A luxurious main-level primary suite and a private lower-level au-pair suite offer a rare level of flexibility and comfort. Soaring 12-foot ceilings, Canadian white oak flooring, custom LED lighting, an imported iron double entry front door, and expansive floor-to-ceiling Pella windows fill the home with natural light. The open-concept layout is ideal for entertaining, highlighted by a striking stone accent wall with a linear fireplace and seamless access to a covered balcony from the family room and breakfast area. The chef's kitchen is a standout with German Leicht cabinetry, gold Calacatta quartz countertops, a waterfall island with seating, designer lighting, premium appliances, and a fully equipped catering kitchen. The main-level primary suite offers a spa-inspired bath and dual walk-in closets, while two additional ensuite bedrooms, a private library with custom built-ins, mudroom, and laundry room complete the main floor. The bright, walkout lower level lives like its own retreat with a bar/kitchenette, recreation and game rooms, two bedrooms-including the private au-pair suite-1.5 baths, and generous storage with room to create a future gym or media space. Additional highlights include a full-house Generac generator, irrigation system, and a three-car garage with 220V EV outlet. Ideally located just minutes from the Village of Great Falls with easy access to Tysons, Reston Town Center, the Dulles Toll Road, and I-495.