Rose-Maree Couch and her three-year-old daughter Sapphire-Hope Couch died after the fire at a Whitehall St, Mairehau, home on May 14.
Sapphire-Hope died at the scene, while her mother was taken to hospital and died from her injuries the next day.
Their funeral was held Linwood Crematorium yesterday.
In a statement this morning police said investigations had determined the fire was not suspicious.
Detective Senior Sergeant Jo Carolan said their inquiries indicated that the fire started in one of the bedrooms.
"An electrical fault was considered but has been ruled out as a contributing factor."
Det Snr Sgt Carolan the matter had been referred to the Coroner, "and at this stage, no criminal proceedings are being considered".
She said police and fire officials wanted to stress the importance of working smoke alarms, and urged all households to regularly check that their alarms are installed and functioning properly.
"This fire was heartbreaking and a tragedy for the family."
- Allied Media
