Several days of smouldering most likely caused a 17th Ave house to catch fire last night.
Tauranga and Greerton fire brigades were called to the property about 8.45pm after the occupant came home to a house full of smoke.
Greerton brigade station officer Steve Wright said it appeared the fire had started behind the walls of where a 1970s inbuilt fire place was.
There could have been a slow build up of heat over a few days with continual use of the fire which caused the ignition, he said.
The occupants, a couple renting, of the home had left for a couple of hours when a woman came back to a house full of smoke.