The Millennium Tower is a 58 story residential tower that opened in 2009 and was seen by many as the premier luxury building in the City. The problem is that this building's foundation was not built down to bedrock and as a result has been sinking. Some of the tenants claimed that the developers had led them to believe that the sinking was subsiding, but from recent reports this is not the case.
The sinking will continue to be a problem for this building at least throughout the near future until developers actual fix the problem.
For additional information feel free to read the post at http://www.msn.com/en-us/news/us/leaning-san-francisco-tower-seen-sinking-from-space/ar-AAkS38H?li=BBnbfcL