The structure is expected to be finished by summer 2007, after which Norway's National Opera will complete the interior work. Opera chief Bjêªrn Simensen hopes he and his staff will be able to move in by January 2008. If all goes to plan, the inaugural performance will be held in April 2008, instead of September 2008.
The building, designed by Norwegian architecture firm Snoehetta, is made with stone and glass and situated next to the waterfront at Bjêªrvika.
The project was initially embroiled in years of controversy over spending and location. Costs are expected to reach $450 million but the project, one of the largest in Oslo's history, has remained within budget. Officials hope it will help reinvigorate the waterfront area.