The 80-cover restaurant and 40-cover bar, named Granary Square Kitchen, will open in a 6,300 sq ft space within the Western Transit Shed at King's Cross.
Loubet, who will divide his time between the new venue and his current restaurant at Clerkenwell hotel, The Zetter, plans to create an informal atmosphere within the restaurant and will serve a menu inspired by his travels across the world.
As discussed in a video interview with BigHospitality at The Restaurant Show last year, the chef will also be showcasing his 'passion' for vegetables by making them a major focus rather than simply the garnish.
He said: "Increasingly I am seeing people growing their own and chefs being more adventurous with new and old varieties. I have always had a passion for vegetables, and love tending my own little garden at home. While we will not be a ‘vegetarian’ restaurant, there is so much cooking scope with vegetables that I am looking forward to exploring at Granary Square."
The new venue, with its menu focusing on vegetables marks a move away from the chef's current French bistro style and will allow him to experiment more.
He told BigHospitality last year: "We are just going to turn things around a little bit, like the vegetable will become as important as the meat or the fish on the plate. It will reflect what is happening today. People like to eat a bit lighter, and maybe different courses, they don't want a big piece of meat.
"There's nothing wrong with the meat, once in a while I like to have a nice steak, but I think it's more in the taste of today to eat a bit lighter and more vegetables as long as they are interesting and very tasteful.
"I think the bistro was a good step for me coming back from Australia and a way to make my mark again as a French chef doing good French food at a good price, but now I want to move a bit and do something different."
Loubet plans to make the new venue a 'culinary hub' for food and drink enthusiasts. He will offer cookery and cocktail-making classes and the resturant will also offer a takeaway service, selling salads, soups, pastries and quiches from a separate counter.
The interior will be designed by Russell Sage, who created those at both Bistrot Bruno Loubet and the Zetter Townhouse and there will also be outside seating for up to 100.
Update: Bruno Loubet has confirmed that the new restaurant will be called Grain Store. It will open in early June 2013 in King’s Cross. The address will be 1-3 Stable Street, Granary Square.