Mill Valley Middle School's temporary campus is 65% built, and the district says students will move in when the spring semester starts in January.
Superintendent Elizabeth Kaufman gave the update at an Oct. 19 joint meeting of the school board and City Council, the Marin Independent Journal reported. Because the school sits in a low-lying area and a wet El Niño winter is forecast, contractors raised the classroom floors above Federal Emergency Management Agency flood levels.
The portable campus
The interim campus is going up in the school's staff parking area. According to the Southern Marin Ledger, it will be made up of 29 portable buildings. Modular classrooms arrived in overnight truck deliveries in early October. The district's facilities page lists more twice-daily deliveries through Oct. 30, with flaggers directing traffic. Access between Friends Field and Sycamore Avenue is closed for the length of the project, and drop-off and pick-up have moved.
Kaufman said summer work included removing asphalt and landfill waste, installing utilities, raising the grade and pouring concrete. The middle school was built on a former municipal landfill.
The renovation
Moving students out lets contractors start permitting the renovation of the main campus. The board certified the project's environmental impact report in December 2025. The district says the renovation will replace aging infrastructure, upgrade indoor and outdoor spaces, and improve safety, accessibility and STEM space, all within a $95 million budget. It is paid for by Measure G, the $194 million bond voters passed in 2022.
Measure G also paid for summer work at Park and Old Mill elementary schools and new playgrounds at Strawberry Point. Edna Maguire is next summer.
"The overall middle school project is on schedule," Councilmember Stephen Burke told the IJ.