Mr Tonga spoke to the Herald over the phone as he stood on the edge of the cordon waiting to assess the extent of the damage but said he knows it's all gone.
"The whole thing is wrecked. Ninety-five per cent of all the stuff is wrecked."
But he said he was just happy everyone was safe and unhurt -- most of them were at church. Nine people live at the home, including Mr Tonga's wife, two-year-old daughter, his parents and siblings.
Mr Tonga has owned the East Tamaki house for five years and said he has no idea what started the blaze.
Firefighters told him it might have been the gas bottles for the barbecue but Mr Tonga said he didn't believe it was the source of the ignition.
Everyone was still in shock at what had happened, except for his young daughter who was playing happily in the sun at a neighbour's house.