A new suburb of 30,000 homes will soon start to be created south of the proposed airport site at Badgerys Creek, part of a mass concentration of development to Sydney's south-west.

The suburb of South Creek West will be established on 1500 hectares on either side of the Northern Road, now being upgraded as part of a $3.6 billion road building program in the area, and on land earmarked for a potential extension of the South West Rail Link.

An artist's impression of the proposed town centre at South West Creek. Credit:NSW Department of Planning

The land release comes amid an intensification of federal, state and local government planning in Sydney's south west, to coincide with the construction of an airport in the region over the next decade.

The Planning Minister, Anthony Roberts, said the government would also commit to 150,000 new trees to complement the land release.