Photos by Alex Zarour/Virtually Here Studios, courtesy of Anthony Stellini and Sherri Rogers/Compass

Last sold in 2001, the home was built from plans drawn for the famed Case Study House program. Location: South Pasadena, California
Year built: 1949
Architect: Richard Neutra
Specs: 3 beds, 3 baths, 2,980 square feet, 0.73 acres (guest house: 2 beds, 2 baths, 800 square feet)
Price: $5,999,000

Arguably the most prominent of the approximately 30 architects who participated in the midcentury Arts & Architecture magazine?s Case Study House program, Richard Neutra produced plans for four of the project?s 36 homes. For many years, it was believed that only two were ever actually constructed, and of those, only No. 20, the Bailey House ? currently on the market in a package deal with a Marmol-Radziner-designed contemporary mansion for $20M ? is officially recognized as a Case Study House; the second of the two, variously identified as No. 19 and No, 21, was disavowed by both the architect and Arts & Architecture?s editor, John Entenza, when it was built with changes to the design and materials. However, in the early 2000s, after being hired to oversee the restoration of a South Pasadena Neutra known as the Wilkins House, architect John Bertram began to wonder if the property might actually be one of Neutra?s ?unbuilt? Case Studies. To investigate, Bertram brought in architectural historian and Neutra expert Barbara Lamprecht, who conducted a comparative analysis ...