The funding deals are the first tranche of a record-breaking £3.15bn affordable homes fund secured from the government in November last year.
It represents almost treble the 18,000 homes secured by the final call for bids issued by the previous Mayor in 2014.
The allocations also include eight new strategic partnerships with housing associations.
The partnerships – with L&Q, Hyde, Genesis, Clarion, Network, Notting Hill, Optivo, and Peabody – have been struck between the Mayor and housing associations that are prepared to build new homes at scale and deliver at least 60% affordable housing across their projects.
These partnerships will deliver 38,500 genuinely affordable homes.
Paul Hackett, Chair of the G15 – representing London’s largest housing associations – said: “The commitment from London’s housing associations is an unprecedented level of ambition to build the homes the capital needs.
“The partnership with the Mayor is the biggest London’s housing associations have ever committed to, reflecting the urgency of the housing crisis and our strong relationship with City Hall.”