There were two appliances from Dannevirke used to quell the flames.
Sinclair said a fire investigator was on scene on Monday to help determine the cause.
A run of fires in Dannevirke prompted a reminder from the fire service to residents to check their smoke alarms were working.
In June a house in Albert St was completely gutted, leaving a woman and three children with nothing.
Two children were also treated for smoke inhalation.
It was one of three house fires in the Tararua town in the space of a month.
A chimney fire spread to the ceiling in one property and just two days later, a house in Victor St was badly damaged.
The cause of that blaze was determined to be from items kept too close to the fireplace.
