Countryside Partnerships is set to build more than 700 homes in north London after striking a deal with mayor Sadiq Khan.
The housebuilder, part of the Vistry Group, was selected by the Greater London Authority to deliver the £276m scheme in Colindale, Barnet.
Under the agreement, Countryside will build 427 affordable homes, while a further 168 will be developed for private sale and 144 for private rent.
The scheme will transform the last two sites on the former Hendon Metropolitan Police training centre and driving school site into five residential buildings and multiple recreational spaces.
Community and retail facilities including a new nursery and social enterprise will also be created, as well as a social-value programme designed to maximise local job and apprenticeship opportunities.
Work is anticipated to start on site in summer 2025 and complete in 2030.
Vistry chief executive Greg Fitzgerald said: “We are thrilled to have been appointed for this transformative landmark scheme to deliver high-quality new housing for Londoners.
“This latest agreement reflects the strength and resilience of our partnerships model, and we look forward to using our track record of successful regeneration and place-making to create much-needed new homes and sustainable communities for the residents of Barnet.”
Deputy mayor for housing and residential development Tom Copley said: “Building more of the genuinely affordable homes that Londoners need is a top priority for the mayor, who last year successfully met the ambitious target of starting 116,000 affordable homes across the capital.
“I am proud to partner with Countryside Partnerships as we provide more of the homes Londoners desperately need and continue building a fairer and more prosperous London for everyone.”
Vistry sparked anger last autumn when it wrote to subcontractors asking for a 10 per cent reduction on the prices agreed in existing contracts.