As many as 5600 homes will be constructed in buildings up to 21 storeys high around two new rail stations in Sydney's north-west, under the government's latest plans for the fast-growing area.

The Kellyville and Bella Vista station precinct proposals by the government's development arm Landcom, released on Tuesday, show thousands of new dwellings will be spread across terraces and taller apartment blocks in the area, which will also include a town centre and new school.

The Bella Vista station precinct will include a town centre, school and thousands of homes in terraces and taller unit blocks.

The government is pushing ahead with its plans for more intensive development in suburbs typically marked by low-rise housing along the $7.3 billion metro train line after it opened in May.

In Bella Vista, the proposal includes a town centre surrounded by between 2905 and 3822 new dwellings in terrace houses and apartment towers reaching 68 metres high, or about 21 storeys.