All staff who have been working out of those two buildings in recent weeks have been asked to relocate to the bank's older office tower at 500 Bourke Street in the Melbourne CBD.
The announcement came as the Victorian government increased restrictions on 10 postcodes,ordering residents living in those areas to refrain from leaving home unless for school,work,shopping or medical care starting at midnight on Wednesday.
The vast majority of large companies have asked staff to work from home where possible for public health reasons. NAB is believed to be the first major Australian employer to mothball a large tenancy to save on costs such as electricity,cleaning and security. It is still paying rent.
NAB's Group Executive People and Culture Susan Ferrier informed staff about the move on Wednesday,saying it was a temporary change.
"Due to the current spike in COVID-19 numbers in Victoria and continued advice from government to stay home,the number of NAB colleagues returning to our corporate offices remains very low,"she said.
"NAB has been a proud part of the Docklands community for the past 16 years. We appreciate this is a difficult time for many small businesses and recognise the business that NAB colleagues bring to the Docklands precinct."