At the heart of the Mayor’s proposal to tear down the end of I-280 in San Francisco is the redevelopment of the Caltrain railyard between SoMa and Mission Bay, the plan for which plugged-in people have long known was in the works.
The 19.1-acre site between 4th and 7th Streets and bounded by King and Townsend currently serves as the terminus for Caltrain in San Francisco with a station that opened in 1975. Forming a ½-mile barrier between the South of Market and the Mission Bay neighborhoods, the railyard site could be redeveloped by moving transit activities underground or off site.
Under a couple of redevelopment concepts and scenarios, the land on which the railyard sits could yield over 1,500 new residential units; over 300,000 square feet for retail; and nearly a million square feet of office space with buildings rising up to 450 feet on the site, with or without I-280 north of 16th Street in place:
Proposed building heights under either the “Highway” or “Boulevard” scenario are varied across the site with taller buildings at the eastern end, decreasing moving west.