A mother and child have been hospitalised with moderate burns after fleeing from their burning home in Porirua overnight.
Emergency services were called to the property on Sievers Grove in suburban Cannons Creek shortly before 3am, central fire communications shift manager Chris Dalton said.
The fire was "well involved" but the extent of the damage was not yet clear, he said.
There was no threat to neighbouring properties.
Fire safety officers were investigating.