Auckland Airport's second runway plans will create height restrictions and noise for more properties.

The second runway is 833m longer and further to the north than the one originally approved, meaning the airport is this morning publicly notifying the plans and will go through a new round of consent hearings.

The airport company has released an interactive map for property owners to find out how they are affected.

Building height restrictions would now affect more properties, but they would only apply to extremely tall structures. Buildings within the limits of the Unitary Plan would not be affected.

The "Obstacle Limitation Surface" (OLS) extends out from the runway centreline restricting the maximum height of buildings and trees to ensure the safe operation of the airspace surrounding the airport. It ensures that aircraft maintains a level of safety while manoeuvring at a low altitude.

About 500 more properties, mainly in Mangere, Flat Bush and Otara, are affected by new noise contours.

Consent was first granted 2002, but the plans were delayed when the volume of traffic dipped around the global financial crisis.

However, the airport company says the 2014 master plan predicts growth in passenger numbers and the aircraft that will be needed to cater for that growth, so it now has to build the runway 72m further north than what was approved 16 years ago.

About 19 million passengers passed through the airport last year and this number is predicted to double by 2044.

The second runway will provide greater operational resilience should one of the runways need to be closed at any time. By maximising the use of the existing southern runway, it hopes the second runway to be operational by 2028.

A final council decision could be appealed to the Environment Court.

Submissions open today ​​​​​and close in a month.