This suburban, master suit + two guest room house sits on the back half of a long lot. The project started as an addition to a modest ’60s Cape Cod. The dominant gable roof lines are all that survive of the original cottage. The “Teal House” is thin to accommodate standard construction and to provide natural light on two sides of every room, which sometimes makes the house transparent. A sense of precise simplicity is manifest in the house down to the simple trims and exemplary finishes.