Firefighters responded to a house fire in Sunbury at 3.11am on May 26.
Fire Rescue Victoria (FRV) said multiple calls were received about the blaze in Dunrossil Drive, and both FRV and CFA responded as the event escalated.
When firefighters arrived the rear half of the property was extensively engulfed by fire, but no neighbouring properties were damaged, and the occupants had evacuated the building, FVA said.
The first truck was on scene within eight minutes and crews brought the fire under control within 35 minutes.
Crews remain on the scene to extinguish and overhaul the damaged section of the house, and a community alert was issued for smoke in the surrounding area.
Zoe Moffatt