Over 300 Housing Executive properties in the Coleraine area will have double glazing fitted this Autumn.
Housing Minister Nelson McCausland MLA revealed that almost 500 homes in East Londonderry will be part of the improvements scheme.
The information came following an Assembly question from MP Gregory Campbell.
Welcoming the news, Mr Campbell said: “This is good news that nearly 600 Northern Ireland Housing Executive properties in East Londonderry will have double glazing fitted this year. The work created by this £ 1Million of contracts in the North West alone is also to be welcomed for those involved in the double glazing sector.”