The authority also raised fears about the design and impact of the project, which would have created 474 flats, 1,880m2 of offices and 720m2 of leisure space on a former Parcelforce site at the gateway to the Brent Cross, Cricklewood and West Hendon regeneration zone.
Intriguingly, it was also argued that the scheme was 'premature' and that the interim knock-on effects 'arising as a result of this development in advance of the comprehensive regeneration proposals for the area' would be harmful.
Prior to the council decision, CABE had given the proposals, conceived as a series of fingers, its muted support.
However, the watchdog too had its doubts, stating that some of the buildings were 'unnecessarily complicated' and that the rooftop details needed 'calming down'.
The practice refused to comment on the decision, and was unable to confirm whether the client was intending to appeal.