Outdoor and Back Yard The largest of three adjacent single-family residences that form the Triad grouping, Case Study House #23A was completed in 1960. The three homes were planned to be the pilot project for a large tract of houses in the La Jolla district of San Diego, but these three were the only ones to be built. The goal for the Triad homes was to design in a manner that created a close relationship between the houses—while still maintaining privacy. All three homes were designed by the architectural firm of Edward Killingsworth, Jules Brady, and Waugh Smith.  Photo 11 of 11 in A Look at 10 Iconic Case Study Houses in California