Due for completion by next summer, the three-storey extension will create room for new boarding gates, seating areas as well as retail storage, food and beverage options, wash rooms, office spaces and VIP lounges.
The expansion is part of the airport’s £220 million capital investment programme, with Edinburgh airport officials expecting passenger numbers to increase by 16.5 million by 2021.
The extension will stretch out from the existing gate 12, at the east end of the airport towards Gogarburn.
It is hoped the expansion will be completed by summer 2018.
