Downtown San Mateo's New Restaurants Are Finally Ready for Their September Debut

"It wasn't a sure thing," Mayor Adam Loraine told ABC7 earlier this year, describing the skepticism that met San Mateo's decision to close B Street to cars for good. That was 2021. Five years later, the same stretch of pavement has absorbed a Thai spot from a Taste & Glory alum, a Sichuan chain making its Peninsula debut, a salad concept celebrating its 20th store, and a Korean BBQ kitchen that started life as a robot-powered food truck in Foster City. None of that is luck. It is what happens when a city spends five years paying for the sidewalk seating, the pop-up jazz trios, and the street closures that make a new restaurant worth opening in the first place.

If you live in San Mateo, you have probably already noticed the churn. What you may not have connected is why September is the month it all comes together, and why the businesses that opened earlier this year are only now hitting their stride.

The mechanism behind the churn

Downtown San Mateo did not become a restaurant magnet by accident. The Downtown San Mateo Association told ABC7 that 50 new businesses opened in the district in 2025 alone, including the Sichuan restaurant Tai Er, and that downtown now holds roughly 600 businesses total. That is a startling replacement rate for a few blocks of B Street.

The engine behind it is an assessment fee that downtown businesses voted to increase in 2023, funneled into maintenance, marketing, and the kind of small recurring events that keep foot traffic showing up on a random Tuesday. Mackenzie Jakoubek of the Downtown San Mateo Association put it plainly to ABC7: the extra revenue paid for pop-ups like jazz trios and a ukulele jam, on top of the bigger annual festivals. A pedestrian mall without programming is just a wide sidewalk. San Mateo built the programming, and the restaurants followed the crowds it created.

That is the part the generic "new restaurants in San Mateo" roundups miss. The opening isn't the story. The infrastructure that made the opening viable is the story, and it explains why the next wave is already close behind this one.

What actually opened, and when

The timeline matters more than any single name, because it shows the wave didn't crest once and stop. It kept rolling from one year into the next.

Tai Er, the Sichuan brand with locations in New York and Los Angeles, opened at 98 E. Fourth Ave. in late August 2025, one of the 50 businesses the Downtown San Mateo Association counted that year. The signature dish is sliced fish poached in bone broth with house sauerkraut, alongside chili oil chicken and cumin lamb. It's been open long enough now that a weekend reservation is worth making ahead, but new enough that plenty of downtown regulars still haven't tried it.

MIXT landed on March 3, 2026, at 301 S B St., in the space that used to be B Street Books. It's the salad chain's twentieth location, timed to the company's 20th anniversary year. The pitch is speed: a quick, healthy option for anyone grabbing lunch between meetings downtown or fueling up before a Caltrain commute.

Mahasan opened quietly this past April at 147 E. Third Ave., a collaboration between the team behind Taste & Glory and Thonglor SF. The menu leans into scratch-made curries and shareable plates, including a lychee duck curry built around seared duck breast in red curry, and deep-fried garlic prawns with a punchy garlic sauce. The owners told the Mercury News they wanted to focus on fresh ingredients and rich homemade curries and sauces while keeping the dishes approachable for everyone.

OLHSO Korean BBQ & Seafood made the jump from food truck to storefront somewhere in that same stretch, trading its Foster City robot-wok delivery trucks for a sit-down kitchen run by chef Sungil Han. The trucks made their name with an automated system that cooked Korean BBQ and seafood en route to customers. The downtown location keeps the same menu, bulgogi, galbi, spicy pork belly, but in an open kitchen built for dining in rather than delivery.

One restaurant from last year's wave, two from this year's, and one that arrived somewhere in between. That's not a cluster. It's a pace.

The September calendar that gives you a reason to go

None of this matters if there's no occasion to actually walk down there. September gives you four.

September Nights closes an intersection to connect two blocks of the pedestrian mall into one larger space, so you can stroll from a live band straight into dinner without crossing a street. Each night features a headliner plus saxophonist Eric Prosch on the side stage.

The Arts & Culture Fest on the 26th is the bigger draw, presented jointly by the San Mateo Area Chamber of Commerce, the County of San Mateo Office of Arts and Culture, and the Downtown San Mateo Association. It runs live mural competitions, artist booths, and a poetry open mic across B Street between First and Third avenues, with the promise that more than 150 downtown eateries are just steps away. B Street from First to Third and Baldwin will be closed to traffic that day. Parking is free in city-owned lots, and Sports Basement is running a free bike valet next to Jeffrey's Burgers at B Street and First Avenue if you'd rather roll in than circle for a spot.

If you're only doing one September Saturday downtown, this is the one where the new restaurants and the street festival overlap on purpose.

Why this year's wave is different

San Mateo has run some version of a downtown festival for years. What's changed is the density of things opening around it. A city that adds 50 businesses in a single year isn't just filling vacancies, it's betting that the pedestrian-only model keeps paying off, and the restaurant wave is the visible proof of that bet.

For a resident, that means the smart move isn't waiting for the "best" new spot to settle in. Tai Er stopped feeling new sometime this year, and MIXT and Mahasan are already partway there. The next name on this list is probably signing a lease right now. The September calendar gives you the excuse to catch the current lineup before it changes again. The businesses give you somewhere to end up when the band takes a break.

If you're weighing whether downtown's momentum is the kind of thing that shows up in home values too, and not just dinner options, Caitlin Beanan tracks how San Mateo's neighborhoods are actually performing, block by block. Reach out for a free home valuation whenever you're curious what your corner of the Peninsula is worth right now.