Classic North Arlington Colonial with timeless curb appeal, thoughtful updates, and beautifully connected indoor-outdoor living in the heart of Donaldson Run. Set on a landscaped 5,764-square-foot lot, this 1949 residence offers approximately 2,650 square feet across three finished levels, with 3 bedrooms, 3 full baths, 1 half bath, an attached garage, multiple fireplaces, inviting outdoor spaces, and a floor plan designed for both everyday comfort and easy entertaining. A welcoming covered front porch opens to a gracious main level with hardwood floors, fresh neutral interiors, crown molding, and charming architectural detail throughout. The formal living room features a fireplace and flows naturally to a bright sunroom wrapped in windows, creating a wonderful flex space for reading, working from home, or enjoying morning light. A separate dining room sits just off the kitchen, offering a classic setting for gatherings while maintaining an easy connection to the home's everyday living spaces. The kitchen is warm and functional, featuring granite countertops, stainless steel appliances, custom cabinetry, a gas range, peninsula seating, and direct sightlines into the expansive family room. The family room is a true highlight of the home, offering generous scale, built-in bookshelves, an entertainment center, overhead lighting, and wired 5.1 surround sound with in-wall speakers. Multiple doors open to the rear patio and landscaped garden areas, creating a seamless connection between indoor living and outdoor entertaining. Upstairs, the private bedroom level includes three well-proportioned bedrooms and two full baths. The spacious primary suite features a gas fireplace, skylight, walk-in closet, and en-suite bath, creating a comfortable retreat with warmth and character. Two additional bedrooms offer excellent flexibility for family, guests, or office space, with one bedroom enjoying charming dormer lines and another positioned near a full hall bath with skylight. The finished lower level adds valuable living space with a recreation room, fireplace, full bath, laundry area, mudroom, storage, and direct garage access. Whether used as a playroom, guest suite, media room, exercise area, or casual lounge, this level expands the home's livability while maintaining practical everyday function. The outdoor spaces are equally special. A fenced rear yard, multiple patios, stone hardscaping, mature plantings, and professionally upgraded landscaping create a private garden setting rarely found so close to the city. Improvements include a property-wide irrigation system, mostly native floral landscaping, cherry tree, crepe myrtle, hydrangeas, rosemary, butterfly bush, roses, black-eyed Susans, mums, primrose, and other seasonal plantings. Additional updates include a 2025 furnace and central air handler serving the basement and first floor, 2025 water heater, 2023/2024 washer and dryer, 2026 dishwasher, 2019 attic heat pump and outside condenser fan unit, 2015 architectural shingle roof, 2018 composite front deck, 2017 epoxy garage floor, smart-controlled overhead lighting, basement chair rail and crown molding, and family room built-ins with surround sound wiring. Perfectly positioned in Donaldson Run/Lee Heights, 4005 25th Street N offers the rare combination of neighborhood charm, natural beauty, and exceptional convenience. Enjoy close proximity to Donaldson Run Park, Potomac Overlook Park, Marcey Road Park, Taylor Elementary, neighborhood shops and restaurants, commuter routes, the GW Parkway, Spout Run, Langston Boulevard, Ballston, Clarendon, Rosslyn, Georgetown, and Washington, DC. With classic architecture, meaningful updates, inviting outdoor spaces, and a premier North Arlington location, this is a wonderful opportunity to enjoy the best of 22207 living.