Firefighters are continuing to dampen down inside the property.
The building is a house divided into a duplex. One end has been extensively damaged by smoke and fire, the other by smoke.
The initial estimated damage bill is $350,000.
The cause is unknown but will be investigated.
The fire has been extinguished.
It was initially feared an elderly woman may have been inside the home but a search of the property by firefighters wearing breathing apparatus has confirmed the building was unoccupied.
Part of the roof is at risk of collapse due to damage caused by the fire.
Firefighters dampen down after extinguishing a house fire in Waramanaga. Pic by Murray Charlton.
Firefighters are currently conducting a search of the property to confirm nobody is inside.
Fire crews are working to extinguish a house fire in Waramanga.
ACT Fire & Rescue was alerted to the incident in Woralul Street at 12:58.
Update to follow.
Guests evacuated from the affected area have been relocated to rooms elsewhere in the hotel.
The HAZMAT crew is currently going from room to room to conduct atmospheric monitoring before giving the all clear.
The laundry has sustained smoke damage and a dryer, where the fire is believed to have started, has been destroyed.