The Cramlington centre of excellence will be home to, among others, Legrand's CP Electronics lighting controls and Legrand Care brands.
The purpose-built site will be designed to optimise processes, capability, efficiency and sustainably.
It will span 40,009 sq ft and includes permission for a service yard and 107 car parking spaces on land at Crossland Park.
Earlier this year, plans for the site were unveiled on Northumberland County Council's planning portal.
Pascal Stutz, chief executive, Legrand UK & Ireland, said: "The opening of our new Cramlington facility underscores our confidence in the UK's manufacturing sector and particularly in the skilled workforce in the North East.
"Legrand has been a proud UK manufacturer for more than 40 years. During this time, the company has grown its expertise to become a trusted partner to contractors, specifiers, wholesalers, installers, facilities managers and building occupants, through our extensive catalogue of products, training opportunities and support services. Indeed, we are already proud members of the Made in Britain organisation, demonstrating our commitment to quality and UK manufacturing.
"Our investment in this state-of-the-art facility underscores our ongoing commitment to UK manufacturing."
Tim Witty, development director at UK Land Estates, added: "This is an incredibly exciting project, and we are delighted to welcome Legrand to the region.
"We constantly invest in our portfolio, and Legrand's new state of the art base on Nelson Park Industrial Estate delivers the highest possible energy efficiency standards as well as offering space for the global business to grow and flourish here in the North East."
