The funding is part of a wider £700 million development programme at Barking Riverside, Brent Cross, Northstowe and Bicester Garden Town, which will will support up to 60,000 new homes, according to the Spending Review document.
Announcing his spending strategy in Parliament yesterday, Osborne said the creation of the new garden city is one element of the government’s "bold plan to back families who aspire to buy their own home".
The money announced yesterday is significantly more than the £200 million Osborne previously pledged to fund infrastructure for the Ebbsfleet project.
Robin Cooper, chief executive of the Ebbsfleet Development Corporation, said earlier this month that the cash is urgently needed as the price tag to deliver the first 10,000 homes of the garden city is "simply unaffordable" for developers.