JJ lived at the Takitimu St house with his mother Josephine Takutai Crystal Lawrence, 26, her partner and another couple with two young infants. All six were home when he died.
Miss Lawrence moved into the house with JJ in July. Before that she had been living with the little boy, who would have turned 3 in March, in Tauranga.
Miss Lawrence is pregnant with her second child and Child Youth and Family is considering removing the new baby from her custody after its birth.
JJ was born at Auckland Hospital in March 2009. His father James Robert Ruhe was said to be "devastated" and "lost" when told of JJ's death.
Ruhe is in prison and did not seek compassionate leave to attend the toddler's tangi near Kaeo. Instead, the Department of Corrections allowed him to transfer to a prison closer to his family in Northland so they could support him.