The 10,000m 2mixed-use development, which will eventually create 135 new apartments and 2,000m 2of office space, was radically altered from the Manchester practice's original proposals.
As a result, a lower element marking the route of the former waterway was incorporated into the proposals, even though the organisation overseeing the regeneration of the area, Ancoats Urban Village Company (AUVC), had not specified such a 'feature'.
However, following the amendments the city council has now thrown its weight behind the scheme.
Project architect Andrew Titterton said: 'We worked very closely with MCC and AUVC on this one.
'Good design comes from good debate. The scheme has matured over the last year or so and we are delighted with the approved scheme.'