The Western Australian Planning Commission has released a draft plan on how to accommodate the 3.5 million people that will live in the Perth and Peel regions by 2050.

With an acknowledgment that the continued sprawl of Perth is unsustainable, key to the Perth and Peel@3.5 million plan is more infill development and an increase in density to accommodate an expected 400,000 extra people in Perth’s central suburbs.

“Sustainable growth requires a shift in our thinking and a readiness to explore and plan for new urban growth opportunities,” the plan states.

Planning Minister John Day said the majority of homes required in the central suburbs would be provided through urban consolidation.

“Of the 800,000 homes we’ll need for the extra 1.5 million people across Perth and Peel, it’s anticipated that 380,000 will be provided through strategic infill options. The majority of these – some 215,000 new homes – will be located within the Central sub-region,” Mr Day said.

“Activity centres, transport corridors and station precincts will absorb much of this development, creating vibrant hubs for people to live, work and play,” he said.

The draft plan would assist local councils meet their infill targets and set an overall target of 47 per cent by 2050, Mr Day said, and would also take into account local character.

“Some areas are more appropriate than others for infill, higher density and mixed-use development so it is important the character and amenity of local suburbs is taken into consideration,” he said.

The WAPC also released four draft sub-regional planning frameworks for the Central, North-West, North-East and South Metropolitan Peel areas, which, once finalised, will become sub-regional structure plans used by state agencies and local governments to guide residential and industrial development, and supporting infrastructure.

The government is calling for feedback on the draft plan until 31 July 2015.