Auckland Airport's plans for a second runway to cater for an expected 40 million passengers per year by 2044 are set to be discussed with neighbours this month.
It hopes to build the almost 3km long runway north of its existing terminals to complement the existing runway to the south.
Despite having gained permission for the landing strip in 2002, it needs fresh approval because the new design is located further north and almost 1km longer than earlier planned.
It appears the second runway will be built on or near the footprint of the former Mangere Aerodrome, the outline of which can still be seen from satellite images.
With the airport's operations affecting hundreds of properties, the new runway is expected to increase disruption to neighbours.
Auckland Airport has subsequently just sent out letters to 504 additional affected property owners and plans to hold a series of meetings with them.
Those directly affected will be offered compensation for insulation and noise reduction measures on their houses.
The new runway comes as airport passenger numbers have grown from several hundred thousand in 1966 to more than 19 million in 2017.
If it is not opened by 2028, the airport says it will be forced to turn away new flights because the existing runway will have reached capacity.
The build will be part of a staged expansion in which the airport is spending $1.8 billion over the next five years to upgrade its terminals, before opening a shortened version of the second runway.
It will then expand its terminals again before possibly extending the northern runway to its full length after 2044.
The plans also leave room for a future light rail connection from the city.
The upgrades will help accommodate larger aircraft expected to become common in the next 15 years.