This home offers a surprising amount of space and flexibility, while nestled on a private, peaceful lot in the vibrant Mantua neighborhood of Fairfax. 3804 Acosta Rd boasts four finished levels with five bedrooms and multiple flex spaces for you to customize to your needs! Curb appeal abounds with mature trees and azaleas welcoming you to the covered front porch. Upon entering, notice the refinished hardwood floors, skylights and incredible window lines that bring the calm feeling of outdoors in! On the MAIN LEVEL, enjoy an inviting foyer open to the living room. Explore the kitchen with bay window, high-end stainless steel appliances and NEW quartz countertops and backsplash. The formal dining room opens to the serene SUNROOM, with backyard access. Also enjoy the spacious family room with beautiful picture window. Venture to the UPPER-LEVEL to relax in the primary suite, with both full-length closet organizer and dual closets, plus an en-suite bath. Notice the hardwood flooring throughout this level, with two additional bedrooms and full bath. On the LOWER-LEVEL, discover two additional bedrooms, a third full bath, and a spacious den/rec room/sixth bedroom, all with level WALKOUT! There is so much flexibility in this home for office space, a nanny/au pair, play, hobbies or guests! Just when you think the home is already perfect, continue down a few steps and explore the BASEMENT as well, which offers a tremendous finished space with open Rec Room and hobby area. You will have so much fun exploring this home - wait until you live there! OUTSIDE, charming string lights welcome you to the fenced backyard on a nearly 0.5-acre lot to relax or play, with two brick patios and sunroom. An attached 2-car GARAGE offers extra storage space and an electric CAR CHARGER, while the driveway offers parking for four+ vehicles. Recent UPGRADES include: attic insulation (2025); HVAC, radon mitigation system, electrical panel, gutter guards, drywell in backyard, refrigerator, stove and dishwasher (all 2024). With updated systems offering peace of mind, beautiful living areas, and a vibrant neighborhood with events and welcoming community feel, this home checks all the boxes! Schedule your tour today!