Downtown Mill Valley's Dark Windows Are Mostly Spoken For
October 22, 2026
October 22, 2026
"Putting $8,000 or $10,000 into the city coffers before I even sell one item is just a huge hurdle." Councilmember Urban Carmel was describing what he had heard from people hoping to open a business downtown. The Mill Valley Briefing quoted him in its August survey of every block in the downtown core.
A walk down Throckmorton this fall takes you past a lot of brown paper and plywood. Most of those windows already have a tenant. The empty-looking stretches of downtown are mainly businesses in the middle of a build-out. They are arriving under rules the city rewrote this spring.
In mid-August the Briefing counted 93 street-level storefronts downtown. Sixteen had no open business. Of those sixteen, nine already had a confirmed tenant that hadn't opened yet. Only seven were empty with no tenant lined up.
| Downtown Mill Valley storefronts, as of Aug. 16, 2026 | Count |
|---|---|
| Street-level storefronts surveyed | 93 |
| Without an open business | 16 |
| Signed tenant, not yet open | 9 |
| Empty, no tenant announced | 7 |
The comparison matters here. Seven truly empty spaces out of 93 puts the downtown vacancy rate at 7.5%. The Briefing set that against Cushman & Wakefield figures: national retail vacancy was 6% in the second quarter of 2026, and the historical average is 7.4%. So downtown's true vacancy sits almost exactly at the long-run norm.
Counting the nine spaces under renovation pushes the share of storefronts you can't walk into up to 17.2%. That second number is the one you see on a stroll. The first is closer to what is actually happening to the buildings.
The new tenants are opening under two changes at City Hall. First, a November ordinance dropped new parking requirements for most changes of use under 5,000 square feet. Then in April the council passed a zoning rewrite that took effect May 20. It replaced the old Conditional Use Permit with a faster Administrative Use Permit for most ground-floor businesses.
The costs came down too. Senior Planner Daisy Allen told the Briefing that the new administrative permit fee was set at $1,954, and that the standard use permit fee was cut from $7,339 to $5,647. Compare those figures with the $8,000 to $10,000 hurdle Carmel described, and a small operator now faces a smaller bill before opening day.
The two biggest conversions downtown have been in the works for years, and both drew their building permits this year.
Treehouse MV, 60 Throckmorton Avenue. The former Bank of America building is one of the spaces the Briefing said had been empty for years. The City Council approved its conversion in November 2023. In December 2024 the Planning Commission amended that approval, dropping the original restaurant and roof deck in favor of retail, a gallery, coworking space and private offices. A $2,297,000 tenant improvement permit was issued in January 2026, one of the largest permits of the first half of the year. As of the August survey it was still listed as a future tenant.
Wonderhouse, 55 Sunnyside Avenue. The old downtown post office is being converted into a family coworking space. The city issued the permit in May at $1,798,346, according to the Briefing's midyear construction report. The August survey said it would open "this fall."
Indoorra, on Throckmorton near 55 Throckmorton. Indoorra makes bespoke kitchens, wardrobes and custom cabinetry. Its contact page lists two showrooms, "Palo Alto · Mill Valley (Oct 2026)," which points to an opening this month.
Lima Nikkei, 17 Throckmorton Avenue. This one is open now, in the historic El Paseo space. Lima Nikkei is a Peruvian-Japanese restaurant founded and owned by Edwin Sandoval. The menu covers sushi, tiradito, ceviche, robata, katsu and cocktails. Hours are 4 to 9 p.m. Sunday through Thursday and 4 to 10 p.m. Friday and Saturday. It was also booked for the opening wine reception at this year's Milley Awards on October 18 at the Mill Valley Community Center.
The big Throckmorton and Sunnyside conversions needed seven-figure permits. The Miller Avenue tenants are moving into individual storefronts, swapping one shop or restaurant for another.
Gallery space at 38 Miller has also been busy. Dorado 806 ran its exhibition "Lesser Known Monsters" there from September 18 through October 17.
Shops that are already open are adding hours too. Madrona, at 17 Madrona Street, focuses on laminated pastry, wood-fired sourdough and specialty coffee. It's open 7:30 a.m. to 3 p.m. Thursday and Friday and 8 a.m. to 3 p.m. on weekends. The bakery told the Chamber that it now serves pizza on Sunday afternoons, from noon until about 2 p.m. The pies come from head bread baker David Torres, who used to make pizza at The Mill in San Francisco. There's a margherita and a seasonal pie, sold by the slice or whole, in-store only with no pre-orders, and ready in about 20 minutes. The bakery itself suggests taking a whole pie to the Depot or down to Old Mill.
As of the August survey, seven storefronts had no tenant announced.
Five of the seven are on Throckmorton. Jim Welte, executive director of the Mill Valley Chamber of Commerce, gave the Briefing part of the reason some corners stay dark. He pointed to "developers who have money to purchase, but don't yet have a vision for their space." Lower permit fees make it easier for a tenant to open. They can't make an owner pick a tenant.
The Briefing keeps a downtown storefront tracker and has said it will update each address as spaces open or tenants are confirmed. If you want to see the paper come down at 60 Throckmorton or 55 Sunnyside, the tracker is the place to check before your next walk.
At First California Realty, we pay close attention to what opens on Throckmorton and Miller, because those changes shape how a Mill Valley address feels to the next owner. If you're thinking about what downtown's new tenants mean for your own home, let's connect. You can start with a confidential home valuation.
Partner with a dedicated team to experience seamless real estate service. Our collective expertise, from strategic marketing to personalized support, ensures your goals are met with precision and care. Let us guide you through every step, delivering exceptional results tailored to your needs.