OpenAI is quietly lining up what could become a major South Bay beachhead, sizing up a sprawling Mountain View office campus as a potential hub to complement its Mission Bay base in San Francisco. If the deal comes together, the move could unleash a surge of new hires in the city and shake up local commuting patterns and housing demand.
According to SiliconValley.com, the AI heavyweight has been touring a five-building complex on Ellis Street and is reportedly interested in leasing the entire site. Marketing materials pitch the property as an "exquisite" office hub, but the report notes that talks are still in the early innings and no lease has been signed.
An affiliate of KKR Real Estate Finance Trust took control of the campus last year through a deed in lieu of foreclosure and marked the property down sharply from its last sale price of about $357.6 million in 2021. CoStar reported that KKR now values the campus at roughly $120.6 million.
The site has been pitched as a single, unified workplace since TMG Partners and Goldman Sachs bought it in 2021, with Newmark leading the search for a marquee tenant. Newmark executives Phil Mahoney and Jon Mackey are listed as the primary brokers on the offering, according to materials from TMG Partners.
Industry estimates suggest the roughly 449,000 square feet of offices could hold about 1,800 to 2,200 tech workers, depending on how tightly desks are packed. Coverage from SiliconValley.com also notes that KKR’s lower cost basis could give it room to offer eye-catching rental rates to land a giant tenant like OpenAI.
OpenAI has already been bulking up its Bay Area presence this year and, according to The Real Deal, has been looking for as much as 500,000 square feet of space across Silicon Valley as it hires more engineers. The Real Deal also reports that an OpenAI spokesperson told the Business Times the company is "always exploring how to grow our presence in a way that works best for our people and our mission."
What it could mean for Mountain View
Recent data suggests the regional office market is already heating back up. Joint Venture Silicon Valley’s Q3 commercial-space report, produced with JLL, found that about 20.4 million square feet of leases were signed in Santa Clara County, San Mateo County and Fremont in that quarter alone. Those numbers indicate that landing a heavyweight occupier could add even more pressure on housing and transit in Mountain View, even as it delivers fresh payrolls and local spending, according to Joint Venture Silicon Valley.
Next steps
For now, the Ellis Street campus is still being marketed and there is no public record of an OpenAI lease. Negotiations for a campus-size block of offices typically stretch over months and can pull in Mountain View officials on questions like permits and commute planning, and analysts say KKR’s pricing strategy and any rent incentives will largely determine how fast a deal moves, if it happens at all, per CoStar.
