**Spectacular Hampden Riverfront Estate - Luxury, Efficiency & Endless Possibilities!** Custom-built as a forever family home, this exceptional Hampden estate combines timeless design, luxurious living, and outstanding energy efficiency. Built with insulated concrete forms (ICF), the home features natural gas heating, radiant floors, European-style panel radiators, and high-efficiency systems designed for comfort and performance. Set on 2.5 acres with 187 feet of frontage on the beautiful Penobscot River, this remarkable property offers breathtaking waterfront views and a peaceful setting just 15 minutes from Northern Light Eastern Maine Medical Center, St. Joseph Hospital, downtown Bangor, shopping, and dining. The inviting main level features an entry room and mudroom leading into a spectacular great room with a chef's kitchen, pantry, spacious living area, and gas fireplace. Expansive windows capture the stunning river views, while a covered porch provides the perfect setting for relaxing or entertaining. Four spacious bedrooms include a luxurious primary suite featuring a walk-in closet and separate dressing room, creating a private spa-like retreat. Three additional bedrooms offer generous space and custom closets. A three-car garage provides ample storage, with incredible opportunities to expand! The partially finished third floor offers 736 additional square feet, already plumbed for a full bath, with heat and electrical stubbed in. Above the garage, another 612 square feet offers exciting possibilities. The 1,350-square-foot basement features radiant heat already installed in the floor and tremendous finishing potential. **That's approximately 2,698 square feet of additional expansion potential!** With exceptional construction, energy efficiency, generous living spaces, and spectacular Penobscot River frontage, this extraordinary property offers a rare opportunity to enjoy refined waterfront living with room to grow!