Located in the heart of downtown Thomaston, this classic colonial-style duplex sits on a generously sized in-town lot and offers exceptional versatility and opportunity. The spacious yard features lawn space, mature fruit trees, and charming peek-a-boo views of the water—all within walking distance to downtown amenities and nearby Mill River Park. The home is currently configured as two well-appointed downstairs and upstairs apartments. The first-floor unit offers an open-concept living area, a large kitchen filled with natural light, one bedroom on the main level, and two additional bedrooms upstairs. A full bathroom and a multi-purpose laundry room located off the kitchen add to the home's comfort and functionality. This unit also enjoys access to a full, unfinished basement—ideal for storage, hobbies, or workshop space. The second-floor unit features a galley-style kitchen, a bright and sunny living room, a versatile dining space, a full bathroom, and a laundry room. Two bedrooms are located on the third floor, along with convenient storage on the landing by the front door. The property works well in its current configuration as an owner-occupied home but also lends itself to a variety of uses, including an extended family arrangement, an income-producing duplex, or conversion back into a spacious single-family residence. Additional features include a detached two-car garage and a barn space with a homemade sauna; a unique and inviting bonus. With its flexible layout, outdoor space, and central location close to the harbor, shops, and amenities of Thomaston, Rockland, and beyond, this property presents an excellent opportunity in one of Midcoast Maine's most sought-after communities. See also MLS#1647375 for multi-family listing.