BAA plans to build sixth terminal at Heathrow, which could result in demolition of 700 homes.
Airport's operator BAA today published plans to build a sixth terminal at the airport.
The company said it has to be built to serve the third runway.
The plan would mean hundreds of houses will be demolished to make way for the runway and the new terminal.
However hundreds of residents have already slammed the plan and said it confirmed their fears that the massive Terminal 5 project, which will be finished in 2008, would not be the last to be built at Heathrow.
The third runway will be built between 2015 and 2020 on condition that BAA is able to meet new limits on pollution. If expansion goes ahead the villages of Sipson, Harmondsworth and Harlington will be affected.
It is understood that 700 houses and a primary school would be demolished.
Plans for a third runway were given the conditional go-ahead by Transport Secretary Alistair Darling almost a year ago.
Mick Temple, managing director for BAA Heathrow, said that Heathrow is one of the world's great airports but it is recognised that it needs modernising.
He said: "We are proud of the fact that Heathrow offers enormous benefits to the local and national economies, but are also keenly aware that our operations have a significant impact on our surrounding communities."