Workers shut out of one of Wellington's largest office blocks by last month's earthquake will be allowed back in from Thursday.
Engineers found quake damage to the stairs of the 17-storey Asteron Centre, which houses the head offices of Inland Revenue and the Civil Aviation Authority.
The building, opposite the Wellington Railway Station, opened just six years ago.
In a note to staff, Inland Revenue chief executive Naomi Ferguson said the strengthening of the stairwell was completed and engineers said it would be safe to exit the building in an emergency.
Ms Ferguson said she was very confident that the building was sound after three engineering checks.