Pinterest has been looking for a new home for its headquarters for quite some time to replace its current 60,000 square-foot space, and has lost out on several spaces such as the 333 Brannan building taken by Dropbox and 270 Brannan just down the street. Last week, the growing social media company reportedly signed a lease to take over the San Francisco Design Center, a four-story, 311,000 square-foot brick warehouse at 2 Henry Adams Street. Pinterest would replace numerous showrooms that are now in the building, which is 90 percent occupied. Tenants would receive relocation assistance. The building is currently zoned for PDR (production, distribution and repair), not office space. However, its owner filed paperwork to designate it as a historic landmark last year, a designation that would allow it to change uses. Supervisor Malia Cohen is attempting to fight the transformation of the building.