Independent commissioners have given the controversial Dome Valley dump, located north of Auckland, the green light subject to conditions.
Waste Management has been granted resource consent for the 60ha dump 5km from Warkworth.
The plan was strongly opposed by iwi and community groups due to cultural and environmental concerns.
Waste Management has said the landfill was needed to cater for Auckland's growth.
In a decision released today, the proposal was given the go ahead by most of the independent commissioners.
This approval was subject to conditions including environmental and noise monitoring.