2175 Market sits at the nexus between three distinct neighborhoods in San Francisco: the Castro; Duboce Triangle; and the Mission. This 88-unit, six level, LEED Platinum, mixed-use building creates a dramatic marker at this crossroads location. Our process involved an analysis of the surrounding blocks, San Francisco patterns, design and jurisdictional guidelines, and consideration of views and sun orientation. One of the most important factors in the design was the social aspect of this location between the neighborhoods and the bustling activity along Market Street. Smaller units are located on the North elevation to activate and engage with Market Street. Larger units in a walk-up building relate to the neighboring architecture along 15th Street. Other design goals were to provide a variety of open spaces with the courtyard and roof deck; create high-quality, livable units; minimize the environmental footprint; and reflect the structure in the materials.