The garage of a Broulee home and a car was destroyed by fire on Tuesday night, November 5.
Multiple emergency services were called to the blaze at Martin Place at about 11.50pm.
Moruya Fire and Rescue crews were first on scene followed by Batemans Bay Fire and Rescue crews.
Moruya's station commander Mark Gould said crews wore breathing apparatus' to attack the blaze.
"When we arrived, the garage was fully alight with a car inside," he said.
"The people inside who evacuated, had attempted to put it out with a garden house - which didn't work.
"We started an external attack until the power had been switched off and then moved in for an internal attack to prevent fire from spreading throughout the home."
He said there was also heavy smoke showing from eves all around the house.
Mr Gould said the fire was brought under control in about half an hour.
"The fire was knocked down pretty quickly," he said.
"Although there was quite extensive heat and smoke remaining throughout the house, which took a few hours to extinguish."
He said the fire had impinged through the garage walls and into the house causing smoke and heat damage.
No surrounding properties were at risk and no one was injured during the blaze.
Mr Gould said it is undetermined what caused the fire and investigations are continuing.
NSW Ambulance was at the scene for firefighter safety and NSW Police also attended.
Rural Fire Service crews from Broulee, Moruya and Malua Bay assisted to make sure the fire did not reignite.
Mr Gould said it was a timely reminder for residents to check they had working smoke alarms.