Expanded with a major addition by a respected Lexington builder, this sun-filled 5-bedroom, 4-bath Colonial with 5,461 sqft offers a flexible layout in a highly regarded school district. The first floor features a spacious kitchen, living room, fireplaced sitting room, cathedral-ceiling family room, sunroom, and a first-floor office with adjacent full shower bath ideal for guests or multigenerational living. The second floor includes a vaulted primary suite with fireplace, walk-in closet, and programmable shower, plus three additional bedrooms and a double-sink bath. A top-floor bedroom with sitting area adds bonus space. The walk-out lower level offers a full bath, exercise room, finished storage, and large function room. Additional highlights include an updated kitchen with new gas cooktop, updated baths, seller-owned Tesla Solar Roof, Tesla EV charger, 2-car garage, landscaped yard, and convenient access to Wilson Farm, Wagon Wheel, conservation trails, and Route 2.