This 'final hurdle' of a document is scheduled to be signed next month and will mean work can begin in earnest on the redevelopment.
The news comes from London's new design director Peter Bishop, who has been working closely on the scheme for the past five-and-a-half years for Camden council.
In an exclusive interview with the AJ, Bishop said: 'We have established all Section 106 agreements, and we will be signing in November.
'It's been a great accomplishment steering a scheme as complex as King's Cross through the minefields of community and political process, and doing so without a public inquiry.
'It will be a futuristic scheme, especially in terms of public access - it will really buck the trend.'
The news will come as relief to developer Argent, which was bracing itself for a judicial review following a campaign by local residents who claimed Camden council's handling of the affordable housing was 'flawed'.
It was originally thought that the allocation for affordable housing was too small, but an agreement has been thrashed out and the 20-year programme to redevelop King's Cross is under way.