Set on a lush, 1.53-acre lot in the Los Angeles neighborhood of Pacific Palisades, Case Study House #20 was designed by Richard Neutra in 1948. The pioneering architect was approached by the Baileys, a young couple, to build an affordable house that could easily be expanded as their family (and wallets) grew with time. Today, it’s not only the house, but also the site that has grown—a contemporary mansion now sits behind the renovated midcentury residence.

Working with limited square footage and a low budget, Neutra designed the Bailey House with flexible living areas that could expand into the large lot. Inside, natural materials clad the walls and ceilings, helping to reduce decorating costs and maintenance.

Behind the Bailey House lies a contemporary LEED Gold-certified mansion that spans nearly 9,000 square feet with three expansive bedrooms. Other notable features include a chef’s kitchen, and living areas with double-height ceilings and curved archways. Manicured lawns cover the entire compound, and the shared grounds also feature a large swimming pool and koi pond.

Today, the property is owned by Lorna Jane Clarkson and her partner, Bill, the founders of the Australian activewear brand Lorna Jane, who enlisted the firm Marmol Radziner to restore the Bailey House.

In a previous Dwell interview, Lorna explains how they sought to stay close to Neutra’s original vision. “We wanted to showcase the midcentury design while creating a relaxed and inspiring space for me to work,” she notes. “It was also important we create an active living space to share with our team and our customers.”

Ready to turn the keys over to new owners, the duo recently listed the fully furnished, two-home property for $20,000,000. Keep scrolling to see more of both structures.

14800 Corona Del Mar in Pacific Palisades, California, is currently listed for $20,000,000 by Jacqueline Chernov and Kristin Alexander of Compass.

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Related reading: Inside Fitness Mogul Lorna Jane's Elegant L.A. Retreat