428 Marbleton Circle Welcome home to 428 Marbleton Circle, O'Fallon, IL. A large, fenced backyard is the star of this 4-bedroom, 3-bath ranch in O'Fallon! From gardening and outdoor gatherings to simply enjoying the open space, the backyard offers plenty of possibilities. The spacious deck provides a spot for outdoor dining or relaxing while overlooking the yard, and the finished walk-out lower level offers direct access. Inside, approximately 3, 400 square feet of finished living space provides room to spread out. Vaulted ceilings, hardwood flooring, and a gas fireplace highlight the great room, which connects to the kitchen and dining area. A separate bonus room offers flexibility for an office, formal dining room, or additional living space. The split-bedroom layout separates the primary suite from the other main-level bedrooms. Features include a tray ceiling, walk-in closet, and private bathroom with dual sinks, a walk-in shower, and a whirlpool tub. Two additional bedrooms, a full bathroom with linen storage, and a dedicated laundry room complete the main floor. The finished lower level includes a spacious recreation room, living room, fourth bedroom, and full bathroom. Updates include the roof, downspouts, partial siding, and fascia in 2025, plus a new sliding door in the bonus room. Located near Scott Air Force Base, I-64, downtown O'Fallon, shopping, and dining. Schedule your showing to experience the spacious interior and standout backyard!