The BBC has confirmed it is moving BBC Three to Media City UK in Salford along with 1,000 posts as part of a major shake-up.
Developer Peel Group declined to comment on the BBC's announcement but the scale of the additional workforce for the BBC North operation could trigger construction of another phase of BBC buildings to add to the three in the first phase.
The BBC announced a raft of proposals on Thursday designed to help the corporation save £670m over the next five years due to a licence fee freeze until 2017 agreed with the government.
Some 2,000 jobs will also be cut nationwide over the next six years in addition to the 650 redundancies already announced at the World Service.
Around 2,300 staff, or 10% of the total workforce, are already being moved to new facilities at Media City in Salford Quays. They are working on Radio 5 Live, children's programmes and sport. BBC Three will move by 2016 and the extra 1,000 jobs will be phased in over the next 10 years.
Under the plans BBC One will take a 3% budget cut and BBC Two daytime will stop broadcasting original material, instead airing news and repeats.
Director general Mark Thompson dismissed the idea of shutting down any core services. "The danger of closing a service is you face losing audiences critical to the BBC," he said.
More details about the proposals can be found on the BBC North website here