Approximately 50 people have been evacuated following reports of smoke at Royal Life Saving House, Napier Close, Deakin.
ACT Fire & Rescue firefighters have found no active fire and are investigating the source of the smoke.
Three pumpers, the Breathing Apparatus Van, the Bronto, HAZMAT and two commanders are on scene.
Firefighters will conduct atmospheric testing to ensure the building is safe before handing it back to the building managers.