The development will be built on a 15-acre site in Elfield Park, between the A5 and West Coast Mainline and will provide a combination of office space, training facilities, production and storage facilities.
Carey will now apply for planning permission for the Elfield Park site with the intention to start construction works in late 2021.
The firm has an existing office and manufacturing facility in Milton Keynes and has played a pivotal role in completing numerous infrastructure, highways and building projects across the town.
Group Deputy Chairman John Carey Jr, said: “This will be a high-quality scheme that re-purposes a disused piece of land, allowing for a phased development which can be delivered over time to create an exemplar highly sustainable industrial development, targeting BREEAM Excellent.
“We are very excited to be working with MKDP and our development partners Beyond3 to unlock this opportunity.”
MKDP Chair, Nicola Sawford, said: “The Carey Group has a long-standing association with Milton Keynes, and I’m delighted MKDP has been able to help facilitate the company’s increased presence in the town.
“This new site highlights MKDP’s role as a supportive and collaborative partner and promotes Milton Keynes as a place where major companies can thrive and prosper.”