The Cole Valley Residence responds to its unique hillside site, while looking outward to the city and bay beyond. Located along the slopes of Twin Peaks, the single-family home is situated on a steep hill that was a key element in the massing. The home is a series of five stacked volumes, including a heavy and articulated concrete base meant to give the impression of being embedded in the earth. A floating main living level maximizes the horizontal expression of the house, taking advantage of the unusually wide 50-foot lot, and provides a picture window to stunning San Francisco views. Other levels shift and terrace with the hillside, providing a variety of spaces and giving access to multi-level rear yard patios.