Rare opportunity to own a Nantucket-style coastal retreat on coveted Middle Beach Road in Madison. Just moments from East Wharf Beach and downtown, this distinctive property offers timeless shoreline charm, a huge porch, breathtaking tidal marsh views, and glimpses of Long Island Sound from the second floor. Filled with character and reminiscent of a 1920s seaside cottage, the sun-filled main house features iconic fir floors, generous living spaces, and abundant natural light. The spacious 26' x 13' living room is ideal for entertaining, while the private 17' x 10' family room provides a cozy retreat. A first-floor bedroom and adjacent full bath offer flexibility for guests or single-level living. Upstairs are three additional bedrooms, a full bath, and a walk-up attic for storage. Adding exceptional versatility is the detached carriage guest house, built in 2004. This charming space features vaulted ceilings, built-in cabinetry and bookshelves, a trundle bed, a beautifully remodeled full bath, and a delightful kitchen with granite countertops and a breakfast bar.The expansive deck overlooks a stunning tidal marsh and winding serpentine river, creating a spectacular setting for relaxing, entertaining, and enjoying coastal wildlife. Ospreys, egrets, and other shorebirds are frequent visitors.Ideal as a year-round residence, vacation home, investment property, or multi-generational retreat, this exceptional shoreline offering captures the best of Madison's coastal lifestyle.