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.
ACT Fire & Rescue has extinguished a fire in a house at Bonython.
Three fire units and a commander responded to the property in Kneebone Street after being alerted at 3:05pm.
Firefighters arrived to find fire burning in the roof void which was quickly extinguished.
Crews are now searching to rest of the home to ensure the fire hasn’t spread elsewhere.
Firefighters have been told the fire started after a lighting strike struck the roof of the home.
Fire crews are continuing to fight the fire with water from both inside and outside of the house.
Firefighters have started to pull the eves and metal roof sheeting away to get better access to the roof space.
The local ACT Fire & Rescue Community Fire Unit is also on scene assisting with traffic marshalling and water supply.
Firefighters believe the lightning struck the gas main for the property which then sparked the fire.
Fire crews are working to extinguish the fire which has now fully engulfed the roof space of the property.
The Bronto aerial firefighting unit has now also been responded to the scene.
Multiple fire crews are fighting a house fire in Dunlop believed to be caused by a lightning strike.
ACT Fire & Rescue were alerted to the incident in Menzel Crescent at 2:42pm and responded immediately with three fire pumpers and a commander.
Update to follow.