BBC publication Ariel confirms that contracts were exchanged on Saturday 14th July.
A BBC spokeswoman said that the corporation had only sold a long leasehold to the site, not the freehold, meaning that the corporation retains control over what happens to the building and can 'control the legacy' - its plans are for TVC to become a 'creative hub'.
Stanhope plc has the conditional option to buy the freehold in due course.
Following temporary relocation, possibly to Elstree, BBC Studios and Post Production are to lease refurbished office and studio space - along with the BBC’s other commercial arm BBC Worldwide - in the completed TVC scheme from 2014/15.
Wider plans for the whole area will include a 'vibrant mix of uses' (leisure, office, residential) and opening up the site as envisaged in the GLA’s White City Opportunity Area master plan.
The Grade II listed elements of Television Centre will be retained and enhanced, including the instantly recognisable 1960s frontage.
Allford Hall Monaghan Morris (AHMM) are the appointed architects for these wider plans