The elder Popp bought the Le Corbusier chairs in the ’80s and the Arco Flos lamp in the ’70s; the Philippe Starck barstools were purchased recently for the apartment. The antique rugs are from Ronald Popp’s collection, and the art is by mostly Bay Area artists. To help control costs, Popp worked with much of the existing 1950s building’s elements, such as the brick fireplace, giving it a coat of white paint “to provide a better background for the art.” Just off the living room, accessed through a floor-to-ceiling glass door, is a garden for Popp’s father.  Photo 1 of 6 in Renovation: 800 Square Feet