An Antrim-based company, Camden group, is to create 225 new jobs with a £16m investment.
The company is one of the UK and Ireland's largest manufacturers of PVC windows, doors and conservatories.
The expansion has attracted £1.6m of public grants and most of the investment will be focused on a new research and development plant.
The new jobs will be created over the next three years.
Invest NI said when they are in place, they will create £4m in wages and salaries annually.
Announcing details of the investment Enterprise Minister Arlene Foster said it was "welcome news for the local community and wider economy".
"Camden is among the many Northern Ireland companies that are focusing on new product and process innovation to enhance business performance," she said.
"With support from Invest NI, Camden will streamline its manufacturing process and be best placed to gain new business."
As well as research and development, Camden will also establish a new sales division to target opportunities outside Northern Ireland.
Kieran Lavery, managing director of Camden Group said: "We have identified significant opportunities in the GB new build housing market, particularly in south east England.
"The benefits gained from this project will place us in a strong and competitive position to win new business."