A super energy efficient, beautifully crafted post & beam home is your haven in delightful Cotuit. Boasting an R-38 full envelope insulation factor, this 4 bedroom, 3.5 bath in highly sought-after Cotuit Bay Shores, teems with nature, charm and privacy! Solid hemlock beams and spruce flooring abound throughout. The open and airy 1st floor boasts a cozy living room with handsome stone fireplace, dining room with French doors onto a small deck, a home office with built-ins, an expanded eat-in kitchen with custom wood cabinetry and cheery sitting area overlooking the tranquil backyard and a koi pond, plus a half bath. A large 3/4 year sunroom adjoins a spacious deck overlooking common acres of bird-filled woodlands. Upstairs is an expansive primary bedroom with private bath and w/i closet, two more bedrooms, each with a cathedral loft area, and a shared full bath with a jetted tub. A large 4th bedroom with ensuite bath is tucked above the oversized two-car garage--a great guest suite/studio/office! The walkout lower level features a fabulous den/playroom. Outside, the grounds are intricately terraced with Goshen Stone and planted to attract birds and butterflies. Cotuit Bay Shores' well-maintained private amenities, all walkable from the property, include a private beach on North Bay, assn. boat dock, kayak/paddleboard storage, four tennis/pickleball courts, bocce ball, playground, and extensive walking trails. A hundred-plus acres of conservation land across the street give access to crystalline Eagle Pond and more woodland trails. Your slice of Cape Cod heaven!