Shepherd Developments and 5plus Architects have been told they can redevelop Trafford Metropolitan Borough Council’s Grade II-listed town hall.
Planning permission was granted by councillors but the decision has to also be approved by communities secretary Eric Pickles.
The council’s chief planning officer will then ratify the 8,900m² project which will end up bringing the council’s office buildings under one roof.
Conferencing and training facilities for both council staff and the public will be created, as will some public garden space and courtyards.
The architects said their plan will see the number of council staff desks reduced by 60%.