When firefighters arrived they were told two people were trapped inside the blaze. One person was rescued, but Meena Kishor Prasad's life was claimed by the fire.
St John said one person suffered serious injuries, another was being treated for moderate injuries and the third was in a minor condition.
The three survivors were taken to Middlemore Hospital. A Counties Manukau DHB spokeswoman said two have been discharged.
A resident on the street said there were several fire appliances, police officers and St John staff still at the scene just after 8.30am.
"I've seen it this morning. The fire brigade is there and some people waiting [outside]. I can see - oh my goodness, something has happened there."
She said she could not see any smoke but said the fire appeared to be out.
Fire and Emergency has diverted questions to the police, the police could not presently comment as it is an ongoing inquiry.
