Tucked away on nearly a full acre at the end of a quiet cul-de-sac, this beautifully maintained brick Colonial offers 7,719 square feet (recently remeasured) of comfortable, light-filled living space. Thoughtfully built and cared for by its original owner, the home blends classic design with a warm, welcoming feel throughout. A circular driveway and side-load three-car garage create an impressive arrival, while inside, a two-story marble foyer and sweeping staircase provide an elegant introduction. The main level offers wonderful spaces for both everyday living and entertaining, including a private library with custom built-ins, a gracious living room with tall windows and fireplace, a formal dining room, and a spacious family room with a stone fireplace and easy access to the patio. The kitchen is both beautiful and functional, featuring antique white cabinetry, marble countertops, a striking marble backsplash, and high-end appliances including a six-burner Dacor gas range and double ovens. The sunny breakfast area - with vaulted ceiling, skylights, and a cozy window seat - overlooks the peaceful backyard. A sunroom with cathedral ceiling, skylights, and its own fireplace provides the perfect spot to relax year-round. Upstairs, hardwood floors run throughout five generously sized bedrooms, including a spacious primary suite with a tray ceiling, walk-in closet with custom shelving, and a spa-like bath with soaking tub and dual vanities. The finished lower level offers plenty of flexibility with a large recreation room, wet bar, wine room, game space, den or optional sixth bedroom, and full bath. Out back, the private, tree-lined yard feels like a retreat, highlighted by a stunning 1,400+ square foot flagstone patio - ideal for gatherings or quiet evenings outdoors - with plenty of room to add a pool. All of this in a prime McLean location, just minutes to Tysons, Metro, major commuter routes, parks, and sought after Langley pyramid schools.