Prologis previews 20‑acre railyard master plan centered on new underground Caltrain station

Prologis, the private owner of the 20‑acre Caltrain rail yard between Fourth and Seventh streets, presented an informational master‑plan preview to the San Francisco Planning Commission on Thursday that would move train storage underground, add a new station and create mixed‑use development with parks, retail and room for thousands of housing units.

The plan envisions trains operating below grade while development rises in phases on the roughly half‑mile site, Genevieve Cadwalader, director for the Prologis team, told the commission. “Eventually the storage uses will move off‑site, freeing up the area represented in turquoise to be developed in phases over time,” she said, describing a framework developed after “at least 20 scenarios” of technical study with Caltrain.

Why it matters: The railyard sits amid major public investments — the TJPA “portal” linking Caltrain to the Salesforce Transit Center, the Central SOMA planning area and Caltrain electrification — so the city and multiple agencies have emphasized coordination. The site offers one of the largest remaining infill opportunities in San Francisco and, if…