We demonstrate how the CityHome, which has a very small footprint, can function as an apartment two to three times that size. This is achieved through a transformable wall system which integrates furniture, storage, exercise equipment, lighting, office equipment, and entertainment systems. One potential scenario for the CityHome is where the bedroom transforms to a home gym, the living room to a dinner party space for 14 people, a suite for four guests, two separate office spaces plus a meeting space, or an a open loft space for a large party. Finally, the kitchen can either be open to the living space, or closed off to be used as a catering kitchen. Each occupant engages in a process to personalize the precise design of the wall units according to his or her unique activities and requirements.