Together AI has vaulted from a small local tenant to a major Bay Area office mover. The company just signed a six-year lease for two floors—about 150,000 square feet—at 2 Henry Adams Street in San Francisco’s Showplace Square.
This leap is wild. Just three years ago, Together AI had about 3,000 square feet; now, it’s got space for hundreds of workers.
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As Marin County readers know, what happens in San Francisco often echoes northward. Mill Valley, San Rafael, Novato, and Corte Madera all feel the effects—housing, commutes, even the local business scene.
Together AI’s SF lease signals rapid growth and a wave of AI-driven leasing
With the Showplace Square deal, Together AI will move into what the market calls “a sustainable place” for its hypergrowth phase. Chief Revenue Officer Kai Mak says they’re expanding from a tight base into a campus-like space that could scale to 500 employees by year-end.
The company builds infrastructure and services for training and deploying generative AI models. Investors and other tenants seem to have noticed.
The lease covers two floors in a brick building dating back to the early 20th century. The property totals around 329,000 square feet and is mostly owned by RREEF Property Trust.
JLL represented Together AI. Cushman & Wakefield took care of the landlord’s side.
Financial terms? Not disclosed, which is pretty standard for bold tech real estate deals in the Bay Area.
The scale here is what really pops out. Together AI’s expansion represents a 4,900 percent jump in office space since its first lease.
It’s a classic example of how quickly AI startups are locking down larger campuses to keep up with hiring and development. Marin County’s tech workers—whether in Mill Valley, Tiburon, or Sausalito—keep a close eye on these shifts, since SF-based growth can ripple into local housing and commutes.
What the lease signals for the San Francisco office market
Industry folks see Together AI as part of a broader rebound in the San Francisco office market. CBRE reports that vacancy dropped to 30.8 percent in Q1, down from 32.8 percent at year-end.
Tenants absorbed a record 1.8 million square feet that quarter. AI firms seem to be driving a lot of this activity, pulling tenants back from other sectors.
Local execs speculate this could speed up even more if some “monster IPOs” hit soon. That’s a big “if,” but the buzz is real.
For Marin residents splitting life between places like Fairfax or Larkspur and the city, this acceleration creates a more dynamic push-pull. Residential life in the county rubs up against commercial growth in the city.
The rush for bigger, more flexible office spaces also brings up questions. Transportation, parking, and the availability of affordable housing all come into play for workers crossing the Golden Gate Corridor.
Impact on Marin County workers and communities
When SF office demand spikes, salaries often rise. That strengthens the case for hybrid work, which can shift where people want to live.
In Marin, towns like San Rafael, Novato, and Corte Madera might see more focus on affordable commuter options. Improved shuttles or incentives for tech workers who split their week between city and county could pop up.
For places like Mill Valley and Sausalito, the ripple effects could include:
- Rising interest in mixed-use developments that blend workspaces, housing, and retail—anything to cut down daily commutes.
- Shifts in demand for flexible office layouts to handle rapid hiring, while still keeping community amenities intact.
- More attention to traffic management on the approaches to the Golden Gate Bridge and Highway 101, as tech talent moves around the region.
With the Bay Area’s AI wave still rolling, Marin County officials and business leaders are watching closely. A bigger SF footprint could shape regional planning, housing policy, and transportation infrastructure—from Sausalito to San Anselmo and beyond.
Key players and market context
The deal really highlights how much major brokers shape the market. JLL represented Together in the transaction. Cushman & Wakefield worked on behalf of the landlords.
The property at 2 Henry Adams Street stands as a mid-century brick building. It’s been a fixture in Showplace Square for years—a neighborhood with a lively arts scene and plenty of food spots. Marin families sometimes head there for weekend trips to check out San Francisco’s neighborhoods.
The presence of AI-focused companies like Together AI, alongside peers such as Anthropic and other ambitious startups, signals a bigger Bay Area trend. More well-funded tenants are hunting for larger, adaptable spaces so they can keep up with fast growth.
For Marin folks, it might be smart to watch commuter patterns, housing costs, and maybe even expect more cross-bay collaboration between Corte Madera commuters and San Francisco-based teams.
Here is the source article for this story: Together AI leases 150K sf for new HQ in SF’s Showplace Square
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