Auckland Council is moving 50 contractors into the Civic Administration Building, which in its owns words "has been plagued by asbestos issues over a number of decades".
A council spokeswoman said it continued to monitor the building, as it has done for several years.
"We air test the environment for any risk of asbestos and we are absolutely confident that all staff and visitors to the building are working in a safe environment," the spokeswoman said.
The council vacated about 450 staff from the Civic Administration Buildling in Aotea Square earlier this year for the ex-ASB Tower on Albert St.
The spokeswoman said: "While Albert Street was purchased to address the council's accommodation requirements in the CBD and to provide savings to ratepayers, it has taken the opportunity to use the CAB to house some temporary functions and staff who are decanting from other council buildings.