A new office housing thousands of public servants has been opened in the suburb of Greenway.

The Department of Social Services' new national headquarters at the corner of Athllon Drive and Soward Way will be home to 2,500 staff.

Department boss Kathryn Campbell checks out the new office. Credit:karleen minney

It was opened by Senator Zed Seselja, the assistant minister for social services, at a ceremony on Tuesday morning.

The six storey, 38,400 square metre building was developed by the Cromwell Property Group and is estimated to be worth $260 million.