Christchurch City Council reopened its Civic Offices to the public on Monday for the first time since the earthquake on 22 February.
Council staff worked from temporary premises while the Hereford Street building was being repaired and assessed by engineers.
The council says reports now show the building performed well in the quakes and is structurally sound.
The first staff moved back in two weeks ago.
The rest will return in stages until February when the building will be fully occupied.
Mayor Bob Parker says it's wonderful to be able to welcome people back to the offices and it's another sign that the city is recovering.