The mass housing group project consists of 560 two-floor units with internal staircases aggregated from Robin Hood Gardens’ 6 prototype units. While Robin Hood Gardens fits its puzzled units into two massive buildings, this project aggregated the units vertically and horizontally to create outdoor patio spaces for each resident. The bottom three floors of the high rises are community and parking spaces and the top floors are residential. The vertically aggregated units connects the high rises and acts as internal circulation by staying on the same plane, detached from the valley. The high-rises interact with the contour of the landscape and connect the housing project to existing roads. In contrast, Castle in the Sky elevates the structure from the valley and interacts with the open space.