Welcome to 21344 Rainier Lane, a spacious and beautifully upgraded single-family home located in the highly sought-after Hillside community of Ashburn. This five-bedroom five-bathroom home offers over 4600 square feet of finished living space designed for comfort, function, and everyday living. The main level features an open-concept layout with large sun-filled rooms including a formal dining area, comfortable living and family rooms, and a well-appointed kitchen with quality appliances, ample cabinetry, and a large island ideal for cooking and entertaining. Upstairs you will find a spacious primary suite with a luxurious en-suite bath and custom closets, along with additional bedrooms that provide flexibility for family, guests, or a home office. The fully finished basement includes a second kitchen offering a private and functional space. This home is equipped with a full-house water softener system, adding comfort and convenience. Outdoor living is just as inviting with a custom-built deck in the backyard perfect for relaxing, grilling, or hosting gatherings. The property is located on a premium corner lot offering extra privacy and more natural light with a welcoming front porch and a balcony for additional outdoor enjoyment. Additional features include a two-car garage, wide driveway for extra parking, and landscaped front and back yards. Located just minutes from One Loudoun with easy access to shopping, dining, entertainment, and outdoor recreation. Commuters will appreciate the close proximity to Route 7, the Dulles Greenway, the Ashburn Metro Station, and Washington Dulles International Airport. Zoned for top-rated Loudoun County Public Schools. This home combines spacious living areas, thoughtful upgrades, and a prime location in one of Ashburn’s most desirable neighborhoods. A rare opportunity to own a truly move-in ready home with flexible spaces, quality finishes, and everything you need for modern living.