The $2.6 Billion Redevelopment Transforming San Francisco's Airport — And What It Means for Peninsula Home Values
By Jessica Heredia | Realtor, Silicon Valley & Bay Area
San Francisco Airport is spending $2.6 billion to rebuild half of one of its biggest terminals. Without ever closing the airport. Not once.
Terminal 3 West. Opened in 1979. United's main hub for decades. After 40 years, it was overdue.
But this isn't just an airport story. If you live on the Peninsula — or you're thinking about moving here — SFO shapes your week even when you forget it exists. And buried inside this project is one quiet design choice that reveals exactly what SFO expects this region to look like 20 years from now.
That choice matters more than the price tag.
Why SFO Is Rebuilding a Terminal From 1979
The obvious question: why spend billions on a building that's still standing?
The western half of Terminal 3 opened in 1979. That's older than most of the planes flying in and out of it. And the problem isn't how it looks — a building from 1979 simply wasn't engineered to handle a major earthquake, modern security requirements, or the volume of passengers a major hub moves today.
A significant piece of this project is structural seismic reinforcement. Keep that in the back of your mind — it becomes important later.
Here's the scale: SFO is renovating the existing 650,000 square feet, then adding another 200,000 square feet of brand-new space on top. That's roughly a third more terminal. The difference between a check-in area that flows and one that wraps around the building.
For context, the eastern half of Terminal 3 was already rebuilt and reopened in 2015. The western half was simply next in line.
What $2.6 Billion Actually Builds
The number sounds enormous until you see where it goes. Terminal 3 West is really three connected pieces:
- Renovation of the existing 650,000 square foot western half
- 200,000 square feet of entirely new space
- A brand-new 6-story building for airline lounges and office space
That 6-story building is the one piece that opens a full year after everything else — and that's intentional, not a delay.
For travelers, here's what the renovation actually delivers: a new curbside façade, expanded check-in with self-service bag drops, new security checkpoints including one on the upper level built specifically for AirTrain arrivals, and significantly more space for dining and retail. More than half of what you actually deal with at an airport happens before you reach your gate — the curb, check-in, security. That's exactly where most of this investment is going.
The project is being built by Turner Construction, with Gensler and TEF Design handling the architecture. At peak construction, 500 to 600 workers will be on site. SFO has committed to directing more than $173 million in contracts to local businesses.
How You Rebuild a Terminal Without Shutting Down the Airport
SFO had one rule from the start: Terminal 3 could not close. Not even for a week. United runs too many flights through the building.
So the work is being done in stages, phased across years:
- Fall 2027 — Renovated and expanded western half opens
- Early 2028 — New 6-story lounge and office building opens
- Early 2029 — Redone check-in lobby on the eastern side of Terminal 3
To keep passengers moving safely around an active construction site, SFO built temporary walkways past security. One connects Terminal 3 near Gate E2 to the round food court and the F Gates. A second links that food court to an existing walkway leading to the International Terminal G gates.
In November 2025, SFO also closed the Terminal 3 AirTrain stop — it won't reopen until 2027. The Terminal 2 stop was renamed to serve both terminals in the meantime, with United shifting some check-in operations there.
The Details Most Travelers Will Never Notice
The features that cost the most — and matter the most — are usually the ones nobody sees.
SFO is pursuing the highest green-building certification available for Terminal 3 West. The features behind that certification include:
- Lighting that automatically dims when natural daylight is sufficient
- A smart HVAC system that recaptures and reuses its own heat
- Rooftop solar panels generating on-site power
- Lower-carbon steel and concrete
- A modernized baggage handling system
- Electrochromic windows that adjust with light conditions
- Recycled water systems and hydration stations throughout
- Healthier interior building materials
And then there's the seismic work. The upgrade you'll never see, and hopefully never need — but the one that makes the building genuinely safe for everyone inside it.
For buyers who think in decades, not just a few years: a 1979 building was a slow structural liability waiting to matter. A seismically reinforced, high-efficiency terminal holds its value — and protects the surrounding region's infrastructure — for far longer than you'll own any single home.
The Design Choice That Signals Where SFO Is Headed
Most terminal rebuilds make an old building look new. This one is being built to do something the original terminal simply could not.
Terminal 3 West is being built with flexible gates that can switch between domestic and international operations. One hour, wide-body international aircraft. The next, standard domestic routes. The same gate.
For that to work, international passengers need a path to customs. So the project includes a new secure corridor giving arriving international travelers a direct route to the customs area in SFO's International Terminal — something the old Terminal 3 was never designed to provide.
This is the quiet choice I promised at the top.
SFO didn't have to do this. A simpler, less expensive rebuild could have kept Terminal 3 West as a domestic-only facility. They chose not to. And that decision tells you something no press release ever would.
Why It Matters to You
If you fly internationally for work, this directly changes your day. Landing from overseas at SFO currently means a long, exhausting walk between terminals after an already brutal flight. A Terminal 3 equipped for international gates is a terminal built around your schedule.
If you primarily fly domestic, it still matters — just differently. SFO is placing a very deliberate bet that this region will draw significantly more international travelers in the years ahead.
Here's the data backing that bet: In 2024, international travel at SFO jumped 12%, reaching 15.8 million passengers. International flights now represent roughly 30% of all traffic moving through the airport.
A terminal engineered to flex between domestic and international traffic is a terminal built for an airport that expects that growth to keep climbing.
What This Means for the Peninsula
SFO didn't rebuild Terminal 3 West for how busy it is today. They built for how busy it's going to be 20 years from now.
That's a long-term institutional bet on this entire region — and the kind of signal worth paying attention to when you're deciding where to put down roots.
When an airport commits $2.6 billion to expanded international capacity, it's not optimizing for the present. It's investing in a future where the Peninsula pulls in more global travelers, more international business, and more sustained demand year after year.
Infrastructure investment at this scale doesn't just improve travel. It anchors long-term regional desirability. And long-term regional desirability shows up in home values — well before it shows up on anyone's boarding pass.
The Peninsula keeps building for its own future. That's exactly the kind of signal I watch for when buyers ask me where this market is really headed.
Thinking About a Move to the Peninsula?
If you're weighing a move and want to understand what's actually driving this market — beyond the headlines — I'd love to talk through it.
I work with buyers and sellers directly across Redwood City, Menlo Park, Atherton, and the broader Bay Area. No handoffs, no assistants. Just me, from first conversation to closing.
📞 Call or text: (650) 667-0523 🌐 Thinking about buying or selling? Schedule a discovery call or reach out to me directly!
Even a 10-minute conversation can give you real clarity before a decision this size.
And as always — every transaction I close supports the Homes for Paws Initiative, donating a portion to local no-kill animal shelters on the Peninsula. 🐾
