By the 1990s the constant traffic vibration in central Melbourne led to concerns about the structural soundness of the cathedral, particularly its spires. A public appeal, led by the then Dean of Melbourne, David Richardson, raised A$18 million to restore the spires and improve the interior of the building. The seven-year restoration project was completed in 2009, under the guidance of Falkinger Andronas Architects and Heritage Consultants (now Andronas Conservation Architecture). The restoration works were undertaken by Cathedral Stone and were acknowledged by the Australian Institute of Architects, the Victorian Chapter Heritage Architecture Award 2009 and the Lachlan Macquarie National Award for Heritage Architecture 2009.