More than 700 homes near Heathrow will be eligible for noise insulation paid for by the airport.

The selection has been based on an assessment by an independent noise appraisal expert, according to Heathrow.

A total of 708 homes – in addition to 474 already fitted with soundproofing insulation during the pilot – will now be eligible to apply.

However, the assessment and fitting of tailored noise insulation for all the qualifying properties may take up to four years to complete.

The offer follows a 2014 pilot scheme, running in three zones around the west London hub and chosen according to the level of noise from the overflying aircraft.

As well as 100% of the costs, residents will be offered a wider range of products with a choice of suppliers.

Areas covered by the scheme include North Feltham, Bedfont, Cranford, Colnbrook, Harmondsworth and Stanwell North.

The airport plans further noise insulation programmes, as part of delivering on its third runway commitment to provide £700 million of noise insulation covering 160,000 homes.

Heathrow sustainability director Matt Gorman said: “Our noise insulation programmes are an essential part of our efforts to become a better, quieter neighbour.

“That is why – in addition to incentivising airlines to use the quietest planes and operate them as quietly as possible – we are re-opening our quieter homes scheme.

“We look forward to working closely with the people and communities around us to help improve their quality of life.”