Located in the heart of Osterville, one of Cape Cod's most sought-after seaside villages along Nantucket Sound, 12 Cockachoiset - known as the iconic Windmill House - blends coastal charm with distinctive architectural character. Recognized for its two-story windmill adorned with seaside murals, the home features water views from a private balcony and inviting indoor-outdoor living spaces throughout. The generous great room with custom fireplace opens to a covered patio and private yard, while the kitchen and dining areas are designed for comfortable gathering. The first floor also includes a bedroom suite with sitting room and laundry. Upstairs, the primary suite offers a fireplace, private bath, walk-in closet, and balcony access, alongside an additional bedroom and sitting room. Just moments from Osterville Village, beaches, boutiques, dining, and premier marinas. Adjacent property at 30 Cockachoiset Lane is also available for sale.