HILLSBOROUGH, CALIFORNIA – Designed by 20th-century prolific architect David Adler, the Tobin Clark Estate – also known as the House-On-Hill – was commissioned for Mrs. Celia Tobin Clark, heiress to the Hibernia Bank fortune. As one of America’s most prominent families of the early-20th century, there was no limitation to the grandeur that could be achieved in this Hillsborough mansion. Inspired by the graceful elegance of England's Cotswold Hills Tudors, construction commenced in 1929 and was completed in 1931. In 1992, the present owners meticulously renovated the entire property with loving attention to detail and an eye for preservation while updating the infrastructure to modern-day requirements.


sothebysrealty.com Property ID 4363483.

From the opulent music room to the lovely Otis lift to the incredible hand millwork throughout the residence, no detail was overlooked in the restoration.


sothebysrealty.com Property ID 4363483.


The mansion includes twelve bedrooms – four of which are master suites - twelve full bathrooms and three half baths, four kitchens, a handsome bar room, a paneled card room, a wine vault and many lush gardens. A special VIP suite of rooms has been the guest residence of a prestigious list of U.S. and world leaders including President Richard Nixon, President Ronald Reagan and President Gerald Ford, as well as British Prime Minister Margaret Thatcher and His Majesty King Hussein of Jordan.



sothebysrealty.com Property ID 4363483.

For more than 60 years, this Hillsborough mansion with the unassuming name House-on-Hill has been cited as one of the most spectacular private residences ever created, and one that is certainly without peer in its stately and elegant English style.

Experience the extraordinary on this video house tour of the Tobin Clark Estate.

$29,000,000 USD | Today Sotheby’s International Realty