The project is being carried out by Chalcroft Construction: a specialist in the food sector, which first worked with the firm in 2005.
The latest project involves building a high-care facility, complete with insulated white walls, kerbs and resin floor. It also sees alterations to a blast freezer, upgrades to existing plant and the installation of an innovative air-handling system.
Edward Getley, head of Chalcroft's Food Projects Division, said: "A growth in demand for its products has seen Wingland Foods embark on an expansion programme that will mean it can continue to fulfil its potential."
Work is scheduled for completion in early May.