Who’s behind those ‘SHIMBY’ posters across San Francisco?

San Francisco’s upzoning plan has passed. On Jan. 12, 2026, the day it goes into effect,  developers will be able to build taller, denser buildings on thousands of sites in the western and northern parts of the city.

As the debate over how and where to upzone raged in City Hall, flyers taped to utility poles across the city signaled the launch of a much more DIY campaign to reignite a plan that took shape — and fell through — more than five years ago.

“Mayor Lurie has the chance to fund social housing,” the simple, black-on-white flyers read.