The WA Museum should not be seen as an easy target as the Government looks to make cuts to stem its tide of debt, the State's peak arts lobby group has warned.
Chamber of Arts and Culture executive director Henry Boston said the community had waited too long for the key piece of legacy infrastructure.
The project has fallen in and out of favour under successive governments since being identified 20 years ago as a missing link in Perth's cultural buildings.
The Government announced last year that the Perth Cultural Centre site would be redeveloped at a cost of $428.3 million. Construction is due to start in 2016, with $155.8 million allocated this year in the Budget forward estimates.
Culture and Arts Minister John Day told a pre-election forum in February that the project would only be stopped "over my dead body".
Mr Day said yesterday the Government was committed to delivering its capital projects and understood the importance of delivering a new museum for WA.
"The Government is working on a considered plan following Standard & Poor's announcement," he said. "There have been no decisions made at this stage."Mr Boston said a new museum would showcase WA as a biodiversity hotspot. "Any further delay in the construction would result in another generation being deprived of the opportunity to understand where they live," he said.