Canterbury Museum is in "dire need of repair", is leaky, and has no insulation or air conditioning.
The museum confirmed today it lodged a resource consent application with the Christchurch City Council for its proposed $195m redevelopment.
Canterbury Museum director Anthony Wright said the redevelopment was needed to address seismic, structural, capacity and operational issues that were threatening the future viability of the museum.
He said the current buildings were in "dire need of repair", with cracks in the building letting pests in.
The building also leaked when it rained and there was no air conditioning or insulation.