This large addition to a small house built in the 1950s by The Architects Collaborative uses the original formal and material vocabulary to create a dramatic transformation. The new building sits in a slot of space between the existing house and garage and uses their geometry as a format for opening to the landscape and sunlight. The new building contains - A music room, bar and spacious living room with field stone fireplace New light-filled stair to the second floor Family library with window seats and skylights New master bedroom suite overlooks open fields