A case in point is the super sleek and very expensive Millennium Towers building in San Francisco. According to reports from independent consultants, the 58 story building has sunk about 16 inches and tilts about two inches to the Northwest. Settling is a natural process in any construction project and architects and engineers build that into their model; however, 16 inches since 2008 is a cause for concern. And, the sinking isn’t over. According to the August 9th article in Curbed San Francisco, the building is predicted to drop an additional eight to 15 inches into the ground.