Recently, we reconfigured several units in a four-story midcentury gem of an apartment building atop San Francisco’s Telegraph Hill, an exercise that was not unlike solving a 3D puzzle. We kept the panoramic views of the Bay and city skyline while rightsizing some of the units and carving out a two-story townhouse for the owners. The project shows the adaptability of the original building’s strong modernist bones and the opportunities for adding curves to counterpoint the orthogonal nature of the modernist box.