Beautiful and extensively upgraded 5-bedroom, 3.5-bath Colonial offering approximately 2,500 above-grade finished square feet, plus 1,047.4 finished square feet below grade. Set on a fenced 0.22-acre lot in the sought-after Kingstream community, this exceptional home combines generous living space, extensive renovations, and a glass-enclosed sunroom with a built-in heated pool/spa. The main level features new hardwood flooring, spacious formal living and dining rooms, a den, and an inviting family room centered around a brick fireplace. The fully renovated 2026 kitchen features new cabinetry, countertops, appliances, lighting, and an expanded island, creating an impressive setting for cooking, gathering, and entertaining. French doors open to a glass-enclosed sunroom (unconditioned) overlooking the fenced backyard and containing an approximately 14-by-8-foot built-in heated pool/spa. The installation includes built-in steps and seating, an operational water-heating system, and operational smaller massage/circulation jets. Please review the Pool/Spa and Sunroom Disclosure for additional details. Upstairs are four spacious bedrooms, including a generous primary suite, hardwood flooring, and beautifully renovated 2026 bathrooms. The finished lower level features brand-new carpeting, a versatile lower-level bedroom/den, full bathroom, and generous recreation space suitable for guests, a media room, fitness area, home office, or playroom. Additional highlights include a spacious two-car garage. Major improvements completed in 2026 include a fully renovated kitchen, a remodeled laundry room, renovations to all four bathrooms, new main-level hardwood flooring and basement carpeting, upgraded lighting and ceiling fans, and professional interior painting following wallpaper removal. Earlier improvements include replacement of the heating system (2025), washer and dishwasher (2024), driveway repairs (2023), installation of upper-level hardwood flooring (2022), exterior stairs connecting the sunroom to the backyard (2022), and replacement of the kitchen flooring (2021), roof (2020), central A/C (2019), and clothes dryer (2018). Kingstream community amenities include an outdoor pool, tennis and pickleball courts, basketball court, playgrounds, and several miles of walking trails connecting to the Fairfax County trail system. The home is ideally located within walking distance of Herndon High School, with convenient access to nearby shopping and dining, Reston Town Center, Washington Dulles International Airport, and the Herndon and Reston Town Center Metro stations on the Silver Line. Seller welcomes serious offers and is open to negotiating price and terms.