A walk around the square in September offered the usual story: two restaurants had opened, a food writer had called it a wave, and by October someone was already asking whether Sonoma was "having a moment." It isn't the outside money that moment usually implies. Both of this fall's headline openings on Sonoma Plaza trace back to chef-owners who already run some of the square's best-known kitchens, and both openings coincided with the Plaza's oldest annual tradition marking its 129th year.
That detail matters more than the openings themselves. When the people who already have the most to lose on a block decide to double their footprint on it, that's a read on the neighborhood, not just a menu update.
An Anchor Retires, Another Reopens It
The corner of First Street East and East Napa spent decades as Maya, a Mexican restaurant that closed after its owners retired. The space went to the team behind the girl & the fig, the French-inflected Plaza institution that's anchored the square since 1997. Their new project, Dead Letter, opened inside the building's original identity as a 19th-century post office, playing that history straight through the design: a dim, art-filled dining room with a postal-noir sensibility, vintage touches, and even a $5 Art-o-mat vending machine, according to Sonoma Magazine's coverage of the opening. The menu runs on a Spanish charcoal grill, moving between dishes built for sharing.
That's not a new operator discovering Sonoma. Dead Letter is the girl & the fig team's new project in another corner of the square. Forbes' food guide to the Plaza notes the girl & the fig picked up a Michelin Guide nod in 2024, which is the kind of credential that makes an expansion low-risk in a way a first restaurant never is.
Same Team, New Address
The second opening follows the identical pattern with a different family name. Ari Weiswasser, the chef-owner behind Glen Ellen Star and Stella in Kenwood, opened SMASH near the Plaza this year, a fast-casual burger-and-fried-chicken spot that marks a real departure from the higher-end menus his other restaurants are known for. According to reporting in the Sonoma Valley Sun, the concept runs on two levels: Smash's full menu is available both upstairs and downstairs, with a rotating selection of cocktails from an adjoining bar called the Beacon served alongside it seven days a week.
Two chef groups, two different registers of restaurant, and two new additions near the Plaza. Between the girl & the fig's move into Dead Letter and Weiswasser's move into SMASH, the Plaza picked up a Michelin-adjacent seafood-and-charcoal dinner house and a smashburger counter within months of each other, and neither came from outside the valley.
September Brought Festival Season
September is when Sonoma Valley's calendar gets crowded. The Valley of the Moon Vintage Festival marked its 129th year this September, alongside the Sonoma Plein Air Festival, which brought nationally acclaimed painters to capture the valley's vineyards and light and show the work at Sonoma Plaza Park, according to the Sonoma Valley Visitors Bureau's 2026 events release. The Vintage Festival's own schedule, per Sonoma Valley Events, included a Grape Stomp Competition and a Daytime Festival at the Plaza Amphitheater on the same Saturday as a Grand Tasting at the Sonoma Barracks that evening.
The two openings added new dining options around the Plaza as September's festival season arrived.
The Market Ends, the Festival Begins
The other shift is quieter and easy to miss if you're only tracking restaurant openings. Sonoma's Tuesday Night Market, the weekly farmers market and gathering that runs through summer, wrapped its 2026 run in late August, based on the City of Sonoma's event calendar. That closes out the Plaza's weekday rhythm for the year. What followed it was weekend programming: September's festivals and Sonoma Sundays, the free concert series at the Grinstead Amphitheater, which was scheduled to run through October 4.
"Sonoma Valley's annual events reflect who we are as a community," Tim Zahner, executive director of the Sonoma Valley Visitors Bureau, said in the bureau's own release. That's a fair description of what the calendar shows: a valley that treats its festival season less as a single weekend and more as a monthlong closing argument for the year.
The concert lineup itself, confirmed on the City of Sonoma's site, shows the series' schedule, including its October 4 closer:
- September 6: Sascha Jacobsen & Mark St. Mary, tango and zydeco
- September 20: Tyler Lauren, indie singer-songwriter
- September 27: Robert Dehlinger's Alpha Rhythm Kings, jump jive and swing
- October 4: Sonoma Stealth Band & Joe Smiell Orchestra, closing the season with an Oktoberfest theme
That October 4 date is worth circling. It follows the September 26 festival events, which means the free concert series and the Vintage Festival aren't competing for a crowd. They're part of the same festival season from two different directions, one civic and free, one ticketed and historic.
What a Fall Walk Around the Square Looked Like in Late September
Put it together and the Plaza in late September read differently than it had in July. The weekday market crowd is gone until next spring. The late-September scene included two new kitchens from operators who already had a stake in the square, a 129-year-old festival at full volume for one weekend, and an open-air painting show at Sonoma Plaza Park; Sonoma Sundays, the free Sunday concert series, was scheduled to close on October 4 with an Oktoberfest theme.
The two openings came from operators who already had a stake in the square and arrived as the Plaza drew its biggest annual crowd. That's a different story than "new restaurants opened." It's closer to a signal about how the people who know this square best are reading its future.
If you're weighing what a season like this means for property on or near the Sonoma Plaza and the wider wine country market, Wynne + Morgensen can walk you through what the fall calendar tends to mean for buyer interest and timing in Sonoma Valley specifically. Request a private consultation when you're ready to talk specifics.