This project was followed by the first alteration to the exterior of the building with the addition of a new Colonnade along the western side, which shades nine new large glass openings into the previously solid exterior wall. This Utzon-led project, which was completed in 2006, gave the theatre foyers their first view of Sydney Harbour. The foyers' interiors are now being renovated to Utzon's specifications, to become a coherent attractive space for patrons. The design also incorporates the first public lift and interior escalators to assist less mobile patrons.
Utzon was working on designs to renovate the ageing and inadequate Opera Theatre. On all projects, he worked with his architect son Jan, and Sydney-based architect Richard Johnson of Johnson Pilton Walker.