Locals are advised to keep clear of the scene due to significant debris.
It's been 12 months since wildfires broke out in the early hours of Sunday morning, forcing residents to flee.
No one was in the car, Fire and Emergency says.
The building has suffered extensive damage, particularly to the upper level and roof.
It's unknown if anyone was inside the house at the time the fire ignited.
It's currently unknown when the fire started or what damage it caused.
Investigators will look into the cause.
The blaze has now reached fifth alarm - a status reserved for only the largest fires.
"The feeling in the town is grief."