***OPEN HOUSE SUNDAY SEPTEMBER 20TH 12:00PM - 2:00PM*** Exceptional space, flexibility and outdoor living await at 17 Hallen Avenue. Set on an expansive 40,000-square-foot lot, this sprawling Milton ranch offers 3,658 SF of total living area, an in-ground swimming pool, attached 2-car garage and driveway parking for up to 6 additional vehicles.The 1,941 SF main level features all 3 bedrooms and 2 full bathrooms, providing the convenience of primarily one-level living. The main level offers 8 rooms, including a spacious living room, dining room, eat-in kitchen, enclosed sunroom and a versatile bonus room with multiple access points, including direct access to the garage. Two fireplaces, central air, a main-level laundry area and generous storage add to the home’s functionality.The finished 1,717 SF lower level provides exceptional additional living space with 4 rooms, including a second eat-in kitchen, a large entertainment room and two additional bonus rooms, plus a second laundry area and additional crawl-space storage. The lower level also offers direct backyard access and interior access to the main level. With its second kitchen, full bathroom, laundry facilities and flexible layout, this level offers excellent potential for an in-law or multigenerational living arrangement, or possible ADU conversion, subject to applicable zoning, permitting and approvals.Additional storage is available in the spacious attic storage area and large outdoor shed. Outside, the expansive grounds and in-ground swimming pool create an outstanding setting for entertaining, recreation and summer enjoyment.Ideally situated in Milton, the property combines suburban space with exceptional proximity to Boston—approximately 10 miles from Downtown Boston—while remaining close to Milton Academy, Wollaston Golf Club, East Milton Square, Novara, Abby Park and many of Milton’s local amenities. Nature lovers and outdoor enthusiasts will appreciate nearby Blue Hills Reservation, offering hiking, year-round recreation and seasonal skiing.17 Hallen Avenue offers a rare combination of 12 rooms, two kitchens, two laundry areas, flexible multigenerational living space, abundant parking, generous storage, a pool and a substantial lot—all with convenient access to Boston.