The Alamo Square neighborhood in San Francisco has witnessed a remarkable real estate transaction, with a record-breaking sale of a historic home tied to the billionaire brothers behind StripeJohn and Patrick Collison. The property at 1164 Fulton Street sold for $9.125 millionunderscoring the area’s appeal to a new generation of tech millionaires and AI startups.
The Collison brothers, who founded the online payment company in 2010acquired the home a decade ago. The sale, facilitated by Compass agent Nina Hatvanyclosed at nearly $2 million less than the asking price of $11 millionyet the sellers expressed satisfaction with the outcome.
The Collison Brothers’ Real Estate Portfolio in Alamo Square
The Alamo Square home was purchased for $7.35 million in March 2017 through two LLCs, with the same CPA signing for both. The Collison brothers expanded their holdings in the area by buying the duplex next door for $4.5 million in 2019. This adjacent property was sold for $4 million on April 7with Dave Spillane, Stripe’s former chief accountant, acting as the signatory.
Spillane, who now works for Catalyze Advisors in Miami, was instrumental in the transactions. The buyers of the record-breaking sale, represented by Compass agents Mollie Poe and Declan Hickey, were interested in the property since it went on the market this spring. The sale closed after going into contract on April 13.
A Luxurious Home with a View
The 4,500-square-foot home underwent a gut renovation in 2016 under the previous owner. It features five bedrooms and 4.5 bathrooms, with a living room that offers a stunning view of Alamo Square Park. The facade retains a traditional Victorian style but with a modern twist—a metallic silver paint job and motorized metal panels made from laser-cut aluminum that provide both privacy and light.
The interior boasts wide-plank white oak floors and a statement staircase of fumed oak that spans all four levels. An elevator connects the one-car garage to the top-floor atrium, which includes a secondary kitchen and leads out to a north-facing deck. The front of the home looks directly onto Alamo Square Park, a popular spot for dog owners and tech enthusiasts alike.
The Allure of Alamo Square and Hayes Valley
Alamo Square and the neighboring Hayes Valley have become hotspots for wealthy tech professionals. Hayes Valley, known as Cerebral Valley for its ties to the AI scene, offers a different vibe compared to more traditional luxury neighborhoods like Pacific and Presidio Heights. This unique appeal was part of the Fulton home’s allure.
Nina Hatvany noted that Alamo Square and Hayes Valley attract a diverse range of buyers. While some prefer the established luxury neighborhoods, others are drawn to the alternative, less predictable atmosphere of these areas. The record-breaking sale is a testament to the overall strength of the market, which has seen extraordinary sale prices in recent months.
The luxury single-family market has experienced a significant uptick, with prices rising by 25% to 30% in the last six months alone. This surge reflects the growing interest and investment in the area by tech millionaires and AI startups.
The Collisons’ Global Investments
In addition to their real estate holdings in Alamo Square, the Collison brothers have made significant investments abroad. In 2026John Collison purchased an 18th-century mansion in County Laois, Ireland, for about 20 million euros. The brothers also invested in a derelict 9,000-square-foot Victorian mansion next door, planning to transform it into a hotel and restaurant.
Furthermore, the Collisons are investors in California Forevera 68,000-acre development in Solano County backed by prominent tech investors, including Marc Andreessen, Reid Hoffman, and Michael Moritz. This diverse portfolio highlights the Collisons’ strategic investments in both real estate and technology.
The sale of the Alamo Square home marks a significant milestone in the neighborhood’s real estate history, reflecting the broader trends of tech-driven investment and the evolving preferences of luxury homebuyers.
