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The Del Ray Hotel / Apartments / Shopping center complex in San Diego, was one of Killingsworth's first multi-family dwelling projects. It was designed to provide for all of the necessities in one location. With a large outdoor pool area, landscaped lawn, and covered parking, the complex was a self-contained community, set well back from the surrounding streets. This un-built development was a precursor to the mixed-use retail/residential buildings of today.