Narrow alleys, industrial buildings, and townhouses are the context for this infill project developed on a 50' x 75' lot in San Francisco's South of Market neighborhood. A simple stucco façade provides the framework for a palette of industrial materials. Galvanized metal clerestories, exposed steel stairs and bracing, and large “warehouse” windows are coupled with bay windows and balconies. The nine small but dramatic units contain double height spaces, mezzanine levels and “saw-tooth” clerestory windows.