Defined by sweeping water views, expansive grounds, and exceptional outdoor living spaces, 30 Cockachoiset ( Dillon House ) offers a welcoming coastal retreat designed for gathering and entertaining. The open-concept main level features a well-equipped kitchen flowing into a sun-filled breakfast nook and sitting area surrounded by walls of windows overlooking the water. Additional highlights include a living room with fireplace, formal dining room with custom built-ins, screened sunroom, and a first-floor primary suite with fireplace, water views, walk-in closet, and spacious bath. Upstairs are three bedrooms, multiple decks with water vistas, and a third-floor bonus room for additional living or guests. A private family room with fireplace and full bath above the primary suite provides ideal guest accommodations. Moments from Osterville Village, beaches, waterfront dining, and premier marinas. Adjacent property at 12 Cockachoiset Lane is also for sale.