The fire broke out at a semi-detached property in Thorndale Park, Carryduff, Co Down.
According to the emergency services, fire crews from south Belfast were called to a house in the cul-de-sac off the Hillsborough Road shortly before 1 am on Tuesday.
Neighbours had reported to the emergency services of hearing a number “loud bangs” coming from the property before the fires took hold.
The cause of the fire is still under investigation.
However, police at this stage say they do not believe there were any suspicious circumstances.
Flames from the fire also damaged a property at the rear of the house.