Perched on a hillside overlooking the Pacific Ocean, Del Mar Castle has stood as one of the community’s most distinctive landmarks for more than a century. With its towers, old-world detailing and commanding coastal views, the residence resembles a European estate more than a Southern California home.
Built in 1925 for Ruth and Marston Harding, the home was designed by San Diego architect Richard S. Requa, whose Spanish Colonial Revival and Mediterranean-inspired buildings helped define much of the region’s architectural character during the early 20th century.
An aerial photograph taken in 1927 and preserved by the San Diego History Center shows the residence overlooking the Del Mar coastline, reflecting a period when affluent families were building architecturally distinctive estates throughout San Diego County.
Requa traveled extensively in Europe, studying historic architecture and incorporating those influences into his California designs. For the Harding residence, he created a dramatic hilltop home that evoked the appearance of an old-world castle while adapting it to Southern California’s climate and landscape.
The approximately 10,000-square-foot residence included a detached guest house and featured imported stained glass, handcrafted doors and decorative hardware inspired by European architecture…