“Wearing breathing apparatus, (fire crews) worked quickly to gain access to the house and to knock the fire down,” a Fire Rescue Victoria spokeswoman said.
“The cause has been deemed suspicious and will be handed over to Victoria Police once FRV crews have made the scene safe.”
Arson squad detectives are expected at the scene on Saturday morning to investigate the circumstances of the fire.
“The cause of the fire is yet to be determined and an arson chemist will attend the scene,” a Victoria Police spokesman said.
Anyone who witnessed the blaze or with information is urged to contact Crime Stoppers on 1800 333 000 or make a report at www.crimestoppersvic.com.au.