This small, hybrid garrison- type Colonial was completely uninsulated and could not meet the needs of a growing family. The owners requested a program that doubled the size of the original house but in so doing had to be as high performance as possible. The residence is in an historically significant neighborhood so it was important to design with a vernacular that fit and would not be objected to by the local community. The project received a Home Energy Rating System (HERS) score of 52 by a third-party rater, and has achieved Energy Star Qualification.