More than 16,000 new homes across Macarthur have been approved for immediate rezoning to boost the region's housing supply.
The rezonings in Glenfield, Leppington and Lowes Creek Maryland (Bringelly) are expected to signigficantly boost the region's housing supply.
Planning and public spaces minister Rob Stokes said the NSW Government was progressing rezonings in key growth areas to increase the potential for housing supply by thousands more homes.
"We've responded to the increased demand for greenfield housing as a result of the pandemic by accelerating these rezonings," Mr Stokes said.
"The rezoning of Leppington Precinct stages two and five will allow for up to 2400 new homes while in Lowes Creek Maryland, rezoning will support approximately 7000 homes for 20000 people.
"We're also finalising the Glenfield Precinct Place Strategy, expected to create up to 7000 new homes and 2900 new jobs.
"More homes need more parks, that's why as part of these land releases we've secured 75 hectares of parkland at Glenfield, 62 hectares at Lowes Creek Maryland and 16 hectares at Leppington."
Camden MP Peter Sidgreaves said the NSW Government had also endorsed Camden's Local Housing Strategy (LHS) to enable council to meet the future housing needs of the community.
"This is a significant step towards delivering a strong housing pipeline that supports new homes in the right locations with the right services," Mr Sidgreaves said.
"The LHS ensures the community knows exactly where growth is planned and the types of housing to be delivered."
The Lowes Creek Maryland development encompasses 7000-homes in Bringelly on the site of the historic Maryland and Birling Homesteads.
The Macarthur Developments proposal is expected to be the same size as Oran Park, with more than 23,000 people expected to live there.
The proposal includes plans for a shopping centre, 60 hectares of green space including 21 parks and public open spaces and six new playing fields, and a combined primary and high school.
Two sections of planned developments at Leppington, known as Leppington 2 and 5 are also expected to be rezoned immediately.
Leppington town centre was rezoned by the state government in 2013 and in 2017 it was identified as a 'priority precinct' because of its social, economic and environmental impacts on surrounding areas.
Its new town centre is expected to support the growing community with new schools, shops and services, as well as public transport and improved road infrastructure.
Under the government's plan to fast-track the housing development up to 2400 new dwellings will be built including 1900 dwellings in stage two and 500 dwellings in stage five.
The proposal also includes 8.32 hectares of open space, 2.96 hectares identified for a school site, 23.18 hectares of land zoned for other infrastructure purposes and a 7.6 hectare park vauled at $4million.
The future Glenfield precinct is expected to be made up of 7000 dwellings, six new playing fields, 30 hectares of additional accessible open space and 50 hectares of land retained for Hurlstone Agricultural High School's agricultural needs.