Designed by modernist architect E. Stewart Williams in 1955, the spectacular Koerner Residence in Deepwell Estates is sited on a lot created from four parcels, equaling nearly an acre. Eckbo, Dean, Royston, and Williams were the landscape architects. Both the house and garden have been recently restored using the original architectural drawings and landscaping plan.
On September 5, 2023, the city’s Historic Site Preservation Board voted unanimously (6-0) to recommend to city council approval of the Class 1 Historic Resource designation of the Koerner Residence.
On November 22, 2022, the Palm Springs Preservation Foundation (acting as agent for the owner) submitted the 134-page Class 1 Historic Resource nomination for the Koerner Residence to the city of Palm Springs.
In March of 2021, the Palm Springs Preservation Foundation board of directors assigned the task of writing the Class 1 Historic Resource nomination for the Leon & Thea Koerner Residence to PSPF board member Steven Keylon.