Before the revamp, academy players had access to the same facilities as the senior team at Carrington.
However, after the renovation, the youngsters are now being housed in temporary accommodation and do not have their own dressing or treatment rooms.
Some academy players, selected to train with the senior squad, will use the facilities in the 'emerging talent' change room.
Manchester United is waiting for the arrival of the new academy director, Stephen Torpey, to determine a permanent solution for the academy teams.
The club is planning to create a bespoke training facility for the academy teams, but no timeline has been announced.