Jack Dorsey has kept jackhammers running for 14 years. The Twitter co-founder and current CEO of Block is still renovating his two adjoining mansions in San Francisco’s Sea Cliff enclave, a stretch of coastline that overlooks the Golden Gate Bridge. The project, which spans 1.21 acres along El Camino del Mar, has transformed two separate homes into a sprawling compound featuring rooftop gardens, a large sauna complex, and a plunge pool. But the work isn’t finished.
Dorsey bought the first property, a 1965 modernist house, in February 2012 for $9.99 million. He added the neighboring five-bedroom estate in November 2018 for $21.9 million, bringing the total investment to roughly $31.9 million. Since that initial purchase, the site has seen a $3.7 million redevelopment permit granted in 2016, followed by a further redesign approved in July 2022. Despite these approvals, the physical work has dragged on for more than a decade, with construction trucks and cement mixers reportedly operating around the clock.
The friction is loud. One Sea Cliff resident told NYPost that they have endured the distant rumble of construction for years, expressing hope it will finally end. The neighborhood, once home to Robin Williams and Sharon Stone, is now a hive of activity. According to planning documents, at least 24 homes along the eight-block stretch of El Camino del Mar have filed building permits since the start of 2025. Scaffolding covers mansions, and heavy equipment often blocks the sidewalks.
Dorsey is not alone in this trend. Meta founder Mark Zuckerberg and OpenAI CEO Sam Altman have similarly assembled neighboring properties in Lake Tahoe and San Francisco, respectively. Yet the scale of Dorsey’s prolonged project has made him a specific target for local complaints. Even the views have become a point of contention; a recent SFGate visit found a resident complaining about a visitor photographing the Golden Gate Bridge through a gap in the houses, describing the repeated attention as annoying.
The immediate future remains murky for Dorsey’s timeline. While permits have been granted, no completion date has been publicly announced. Neighbors continue to monitor the site, hoping the noise will eventually fade, but for now, the jackhammers keep running.