The cash injection was announced by housing minister Alok Sharma and will be used to fund a new road vital to the local infrastructure and the development, which aims to build the homes by 2031.
The funding will help to relieve the pressure on local transport networks and accommodate the expanding communities in the local area.
The infrastructure investment promises to boost economic growth across the Science Vale and enterprise zone, increasing employment by 20,000 over the next 20 years.
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Great Western Park estate in Didcot
“This £6.2m funding is excellent news for the Oxfordshire area, promising to boost local growth and turbo-charge the delivery of thousands of new homes,” said Mr Sharma.
“We need to deliver the right infrastructure in the right places to speed up housebuilding and deliver the homes this country needs.”
Councillor John Cotton, leader of South Oxfordshire district council, added: “The district council made a commitment to residents in Didcot that the garden town project would deliver infrastructure.
“So I’m really pleased that we are able to fund the completion of the Northern Perimeter Road – a project that has been sat waiting for years.
“Once completed, the road will relieve pressure elsewhere in the town and provide a real boost to other garden town proposals.”