A large estate in Atherton has sold for $45.5 million after spending more than a year on the market, according to a report by the San Francisco Standard. The property, located at 88 Tuscaloosa Avenue, was purchased by an unnamed buyer described as a “top Silicon Valley executive.” The transaction was completed through an LLC managed by a Marin-based CPA, with Ken DeLeon of DeLeon Realty representing the buyer.
The sale comes after a lengthy period marked by legal disputes and nearly ten years of construction. In 2021, Eric Yuan, CEO of Zoom, agreed to buy the mansion before its completion but did not finalize the purchase. This led builder Ali Sadeghi to take legal action against Yuan over extended negotiation timelines and $37 million in construction costs. The house was listed in fall 2024 at $55 million and remained near $50 million for about a year before selling.
Joe Piazza of Coldwell Banker was brought in by the developer to market the property. He said, “What am I going to do to bring a lifestyle to the buyers, and to really immerse them into the home, and then to, quite honestly, compel them to get involved?” Piazza also noted that the final deal included all staged furniture: “I sold the whole enchilada.”
The mansion features nine bedrooms, 14 bathrooms, five kitchens, two panic rooms, and a 14-seat movie theater. Outdoor amenities include a glass-walled pool, heated cabana with kitchen and bath, fruit orchard, one-bedroom guest house, and sports court. The home covers nearly 17,000 square feet on a 1.4-acre lot.
Atherton has been known as one of the most expensive ZIP codes in the United States but recently lost its top ranking to Fisher Island in Miami Beach. While Atherton’s median sales price is $8.3 million, Fisher Island now leads with a median price of $9.5 million.
“What am I going to do to bring a lifestyle to the buyers, and to really immerse them into the home, and then to, quite honestly, compel them to get involved?” Piazza told the Standard of his thought process.
“I sold the whole enchilada,” Piazza said.



