A Coastal Legacy, Reimagined - With Room for Everything. Set along one of Duxbury's most storied corridors, between Snug Harbor and the Bluefish River, 535 Washington Street is a grand 19th-century Federal-style residence that once served as the meeting hall of the Independent Order of Odd Fellows. Today it offers a combination rarely found on the South Shore: 8,560± square feet with 6 bedrooms and 4.5 baths, sweeping bay views and a location minutes from the harbor, beach and village. The scale is extraordinary. The first-floor Great Room alone measures 40x60 - roughly 2,400 square feet beneath soaring 17' ceilings, with walls of windows framing views toward Duxbury Bay. Anchored by a caterer's kitchen, it is ready for gatherings of every size. Nearby, flexible space with 1.5 baths adapts easily to a home gym, studio, office or au pair/guest suite. On the second floor, an expansive living area with original curved tin ceilings and a fireplace opens to a second kitchen with bay views - ideal for multi-generational living, extended stays or simply spreading out. The third floor is a private retreat: the primary suite, with its own deck and two walk-in closets, plus three more bedrooms, two with vaulted ceilings. Wide-plank hardwood floors, intricately carved woodwork and multiple fireplaces have been carefully preserved throughout, while an elevator, a seller-owned 11.1 kW solar array and a rare 5-car garage add everyday convenience, with room for cars, kayaks and beach gear. Few homes pair this much space with this location, in the heart of Duxbury's historic waterfront neighborhood. The bustling harbor front and the Winsor House are moments away, the iconic Powder Point Bridge leads to six-mile Duxbury Beach, and the Raw Bar at Island Creek Oyster Farm is close by. The Maritime School and Duxbury's top-rated public schools are nearby, and Kingston Station offers MBTA commuter rail service to Boston, roughly 35 miles north. The opportunity is rare: a landmark building in one of New England's most coveted coastal towns, with the volume and flexibility to become a private compound, a multi-generational retreat or an unforgettable home for entertaining. Properties in this location seldom come to market, and almost never at this size. Own a piece of Duxbury's architectural and civic history, reimagined for modern coastal living - a home where fellowship, philanthropy and timeless New England elegance still echo through every room.