What a 635,000 square foot Sunnyvale campus does to housing demand

For two years the AI story was a San Francisco story. Companies took space south of Market, everyone wrote about the recovery of downtown, and those of us who place people in Santa Clara County watched it from a distance.

That stopped being true sometime last year, and the numbers are now hard to argue with. The expansion has moved down the Peninsula into the exact cities where we hold inventory.

The Databricks example

I keep using this one because it's concrete and because it's all in a single city.

Databricks has assembled roughly 635,000 square feet in Sunnyvale across three buildings. It took 305,000 square feet on seven floors at 200 Washington Avenue, becoming the first tenant at Hunter Partners' Cityline development. It added 150,000 square feet on three floors at 250 Washington in December. Then 180,400 square feet at 100 Altair Way, a PGIM-owned building a short walk from the Sunnyvale Caltrain station, with move-ins beginning this spring.

That's one company, one city, three leases. The company also keeps a smaller Mountain View office on East Evelyn that it opened back in 2020.

I'm not going to convert square footage into a headcount for you, because the ratio depends on how a company lays out its floors and nobody outside the company knows their number. What I'll say is that 635,000 square feet is not an office. It's a campus, and campuses get filled over years, and a meaningful share of the people who fill them arrive from somewhere else.

The wider picture

Databricks isn't an outlier, it's just the cleanest example.

CBRE reported in May that technology and AI companies leased more than 14 million square feet across San Francisco and Silicon Valley during 2025, about 55% of all leasing activity in those markets. AI companies specifically have taken roughly 21 million square feet since 2019. And there's more coming: CBRE put active tenant demand from tech and AI firms at over 5 million square feet in San Francisco and another 5 million-plus in Silicon Valley.

The money behind it is similarly concentrated. AI companies have raised $578 billion in venture funding since 2019, and roughly 80% of that landed in the Bay Area.

Vacancy has responded, though how much depends on whose report you read. For Q2 2026, Colliers put Silicon Valley office vacancy at 14.1%, CBRE at 15.2%, Kidder Mathews at 16.0%, and Cushman & Wakefield at 18.2%. Those are four different methodologies and market definitions, and I'd treat the spread as the honest answer rather than picking the most dramatic number. What they agree on is direction: down, with leasing volume at multi-year highs.

Why this lands differently than the 2021 cycle

The last big Bay Area hiring surge was distributed. Companies were hiring remote, RTO policies were soft, and a new engineer might show up in the office twice a month or never.

This one is anchored to buildings. A company doesn't sign three leases in one city over eighteen months for a workforce that isn't going to be there. When I look at what changed since I wrote about the AI hiring boom, the shift isn't that demand went up. It's that demand acquired an address.

For mobility teams that changes the planning problem in a specific way. You're not sourcing scattered units across a nine-county region anymore. You're sourcing repeatedly in a handful of submarkets, against everyone else sourcing in the same ones.

What it means for Sunnyvale and Mountain View inventory

Corporate housing supply in these cities was never deep. Sunnyvale in particular has a lot of newer mid-rise product that leases to individuals on twelve-month terms and comparatively little that's furnished, flexible, and available on 48 hours' notice.

Lead times stretch first. Before rates move, availability moves. The unit you could source in a week becomes a unit you source in three, and the good ones near Caltrain go first because that's where the campuses are.

Then the length premium sharpens. When providers can fill a 90-day booking easily, a 30-day request looks expensive to them, and they price it accordingly. Anyone booking short into a tightening submarket should expect the cost curve to steepen at the short end.

The third one is the one people miss: substitution pressure. When Sunnyvale runs out, your placements land in Santa Clara, Milpitas, or further, and an employee promised a walk to the office gets a commute instead. That's a retention conversation, not just a housing one, and it's worth pre-empting with candidates rather than discovering at week three.

Planning against it

If you're staffing into Sunnyvale or Mountain View in 2027, get your provider conversation started well before you have firm names. Placeholder volume, even loosely specified, is how you get held inventory. Providers allocate to the clients who talk to them early, and that's not favoritism, it's just how anyone with finite units plans.

Think in blocks rather than in individuals if your headcount supports it. The economics of placing a group at once get better as the market tightens, not worse, because you're offering the provider exactly the thing that's becoming scarce: certainty.

And put the geography question in your budget explicitly. If your 2027 assumptions were built on last year's Sunnyvale rates, they're probably light. That belongs in the mobility budget work now, while the numbers are still a draft.

One caution against over-correcting. Office leases are a lagging signal on hiring, not a leading one, and a signed lease commits a company to space rather than to people. Some of that 15 million square feet will fill slower than anyone currently projects. I'd plan for tight rather than for panic, and I'd keep enough flexibility in your booking terms that a slower ramp doesn't leave you paying for empty units.

But the direction is clear enough that if you're building 2027 numbers on the assumption that Silicon Valley stays a soft market, you're building on something that stopped being true a while ago.

Placing employees into Sunnyvale, Mountain View, or Santa Clara next year? Request a free consultation and we'll talk through inventory and hold structures before the market decides for you.

Sources

• AI Boom Drives Office Leasing Surge in San Francisco Bay Area — CBRE, May 12, 2026
• Databricks Expands Again in Bay Area with 305K-SF Sunnyvale Lease — Connect CRE
• Databricks leasing spree grabs 180K sf more in Sunnyvale — The Real Deal
• Databricks Accelerates Bay Area Growth with New Office in Sunnyvale — Databricks
• Silicon Valley Office Figures Q2 2026 — CBRE
• San Jose-Silicon Valley Office Market Report, Q2 2026 — Colliers
• Silicon Valley Office Market Report, Q2 2026 — Kidder Mathews