Statistics NZ staff are moving into a new home after the 7.8 earthquake partially collapsed its headquarters at CentrePort.
Spokesman James Weir confirmed around 80 staff have already moved into the HP Tower in central Wellington with more heading there in the next couple of weeks.
"We are using the space for a temporary period for the purpose of business continuity," Weir said.
Statistics NZ will take up a number of floors at HP Tower but the government department is too large for the building, meaning it is still searching for more space in the city.
Building owner Chris Parkin, who formerly owned the Museum Hotel, told Fairfax that Statistics NZ were negotiating a two-year lease for several floors at the HP Tower.