Fire and Emergency (Fenz) confirmed they were called to the fire, on Hillside Rd in Wairau Valley, at 5.24pm.
They said batteries caught fire inside a recycling plant in Glenfield, creating plumes of black smoke that could be seen across the city.
They have issued an alert for people to stay inside and close all windows and doors.
Fenz said 90 firefighters from across Auckland and Hamilton were responding to the blaze.
Auckland councillor Richard Hills said in a Facebook post at about 8.30pm that he had confirmation from the Fenz the fire had been contained and was under control.
However, he urged people to continue following the advice of emergency services.
At least one home is believed to have been evacuated.
The recycling plant is a charity that recycles materials including batteries, electronic waste and polystyrene.
Police have confirmed they were assisting with the fire.
- APL and RNZ
