The fire has been extinguished.
Firefighters are now using thermal imaging cameras to search the roof space for any hot spots that may remain.
The property, a five bedroom home, has sustained extensive heat, smoke and water damage.
A car parked in the garage of the property has also been destroyed.
ACT Fire & Rescue was alerted to the fire by a neighbour who rang Emergency Triple Zero (000).
There was no one home when the fire started.