Welcome to 3951 Oak St, a beautifully appointed 4-bedroom, 3 full bath, 2 half bath end-unit townhome offering nearly 2,800 sq. ft. of thoughtfully designed living space in the heart of Fairfax City. Situated in the sought-after Mount Vineyard community, this four-level brick-front residence combines refined finishes, a versatile layout, and an unbeatable location within walking distance of historic Old Town Fairfax. Inside, the main level boasts an open-concept design ideal for everyday living and entertaining. The spacious living and dining areas flow seamlessly into a gourmet kitchen, featuring white cabinetry, quartz countertops, a large center island, and premium KitchenAid stainless steel appliances. A private sundeck off the living area offers open views over the American Legion, creating a unique and peaceful outdoor experience. Upstairs, you'll find three generously sized bedrooms, including a primary suite with ample closet space and a spa-inspired en-suite bathroom. Two additional bedrooms share a well-appointed full hall bath, perfect for family, guests, or a home office. The top level offers a versatile recreation room with an additional bedroom and full bath, along with access to a rooftop terrace-the perfect spot for relaxing, entertaining, or enjoying panoramic neighborhood views. On the entry level, a welcoming den and half bath add flexibility, while the two-car garage plus driveway for four vehicles provides a rare convenience in Fairfax City. Residents of Mount Vineyard enjoy professionally landscaped grounds, community gathering spaces, and low-maintenance living-all just steps from local shops, restaurants, and cafes. Favorites like Hamrock's, Dolce Vita, and High Side are nearby, along with outdoor escapes such as Van Dyck Park and Daniels Run Trail. Commuters will appreciate quick access to Route 123, I-66, and the Vienna/Fairfax-GMU Metro station, with both Dulles and Reagan National airports within easy reach. With its spacious design, upscale finishes, and walkable location in one of Fairfax's most charming neighborhoods, 3951 Oak St offers a lifestyle of comfort, convenience, and timeless appeal.