The robotic facade is conceived as a mass-customizable module that combines solar control, heating, cooling, ventilation, and other functions to serve an urban apartment. It attaches to the building "chassis" with standardized power, data, and mechanical attachments to simplify field installation and dramatically increase energy performance. The design makes use of an articulating mirror to direct shafts of sunlight to precise points in the apartment interior. Tiny, low-cost, easily installed wireless sensors and activity recognition algorithms allow occupants to use a mobile phone interface to map activities of daily living to personalized sunlight positions. We are also developing strategies to control LED luminaires to turn off, dim, or tune the lighting to more energy-efficient spectra in response to the location, activities, and paths of the occupants.