HILLSBOROUGH — A buyer involved in the artificial intelligence industry purchased the Hillsborough estate known as Villa de Verano for $70 million. The acquisition of the property at 3000 Ralston Avenue represents the most expensive home sale in the history of Hillsborough.

The residence sits on 12 acres and features 12,400 square feet of living space with six bedrooms. The grounds include a gym, theater, spa, aquarium, pool, rose garden, amphitheater, guest property, seven sports courts, and a putting green.

"Even in the last year, there’s been a major increase of buyers from the AI world. This could be just the beginning of the ultra luxury," said Jennifer Gilson, the listing agent representing Golden Gate Sotheby’s International Realty. The property remained on the market for four months and 22 days after being initially listed for $88 million.

Timeline

The sale of 3000 Ralston Avenue is the most expensive home sale in Northern California in 2026. The median luxury home sale price in San Francisco was approximately $6.8 million in early 2026. Non-luxury home sales in San Francisco increased by 3.8% in March 2026 compared to March 2025. The median time to sell the priciest homes in San Francisco was 12 days in early 2026.

The median home price in San Francisco County increased from $1.8 million to $2.2 million between May 2025 and May 2026. More than 140 San Francisco homes sold for at least $1 million above their asking price in the first six months of 2026. OpenAI and Anthropic are San Francisco-based companies that filed for initial public offerings in mid-2026.

What's New

The previous Hillsborough home sale record was $35 million, set in 2021 when Elon Musk sold a French chateau-styled estate, which was later resold for $35 million in 2022. This serves as a precedent for the $70 million Villa de Verano sale. Hillsborough's prior luxury home sale record was $25 million for the Bing Crosby estate in June 2025, though this figure conflicts with other reports citing the $35 million Musk property as the previous high, showing inconsistencies in local real estate records. The sale of Villa de Verano has not been officially recorded in San Mateo County's deed records as of August 7, 2026, casting doubt on the finalized $70 million price and the buyer's identity, per The Dissent's analysis of public records.

The median luxury home sale price in San Francisco was approximately $6.8 million in early 2026. Non-luxury home sales in San Francisco increased by 3.8% in March 2026 compared to March 2025. The median home sale price in San Francisco was $1.7 million in March 2026. PureSource News previously reported: San Francisco International Airport Solicits Private Terminal Bids. Northern California is region of California, United States.

How Sources Differ

Data regarding the median home price in San Francisco shows a conflict between sources. San Francisco County Assessor or MLS data states that the median home price in San Francisco County increased from $1.8 million to $2.2 million between May 2025 and May 2026. Redfin market data report states that the median luxury home sale price in San Francisco was approximately $6.8 million in early 2026.

A second conflict exists regarding median home price in San Francisco figures. San Francisco County Assessor or MLS data states that the median home price in San Francisco County increased from $1.8 million to $2.2 million between May 2025 and May 2026. Redfin market data report states that the median home sale price in San Francisco was $1.7 million in March 2026.

Why It Matters

The transaction shows a broader segmentation in the housing market driven by income tiers and proximity to AI-driven employment centers, according to an analysis by Compass brokerage. This trend coincides with corporate developments in the sector, as OpenAI and Anthropic filed for initial public offerings in mid-2026.

Regional market data supports the observation of increasing values across different segments. The median price of a single-family home in San Mateo County increased by 8.5% between May 2025 and May 2026. High-end home sales in San Francisco increased by 22.2% in March 2026 compared to March 2025, while non-luxury sales saw a more modest 3.8% increase during the same period.