Heathrow is launching a consultation on their third runway proposal being carried forward for further consideration.
The consultation will run for six weeks from February 3, during which a survey will be sent by post to 120,000 affected households.
It will pose questions mainly about aircraft noise, as well as other environmental and economic issues that are likely to arise with a third runway. It will not ask whether or not a third runway is wanted.
People living will be able to give their views online, and there will be a series of drop-in events in the affected areas, including in Harmondsworth, Harlington, and Longford.
The Airports Commission, chaired by Sir Howard Davies, was set up by the government to explore ways to provide additional runway capacity in the south east of England.
Two Heathrow expansion options - to the north west of the airport, and the lengthening of the northern runway - were included in the Airports Commission's interim report shortlist, published last month.
The latter option was not drawn up by Heathrow. The north-west location would result in the demolition of around 900 homes in Harmondsworth and Longford.
A second runway at Gatwick is also being explored further.
Heathrow now wants input from the affected communities as it fine-tunes its proposal.
The Commission, and the Government will ultimately decide if Heathrow will expand, after the next General Election in 2015.
Chief Executive Colin Matthews said: "This consultation is to make sure we correctly understand what local people value and that we can take their views into account as we refine our proposal.
"The more people that tell us their views, the more successful the process will be.
"We know that opinion is divided locally about whether a third runway should go ahead or not, but everyone has an interest in making sure that if a third runway does happen it is developed in the best way possible."
At this early stage, there are no indicative flight paths, nor detailed for how various areas will be developed.
The feedback from the consultation will be used to further shape proposals, to be submitted by May.
Do you think this third runway bid will get off the ground? Send your views to editorialuxbridge@trinitysouth.co.uk, or leave a comment below
