More than 250,000 new dwellings could be accommodated along Perth's key transport corridors by developing more medium and high-density housing, according to a study.
It found that high-quality "infill developments" - where residential densities are increased on existing and often underused land - could help address pressing urban challenges including traffic congestion, the lack of housing choice, housing affordability and the loss of natural habitats.
Transforming Perth, launched yesterday, was undertaken by the Property Council of Australia, the office of Greens Senator Scott Ludlam and the Australian Urban Design Research Centre.
It concentrated on seven transport corridors - Charles Street/Wanneroo Road, Fitzgerald Street/Alexander Drive, Scarborough Beach Road, Great Eastern Highway, South Street/Ranford Road, Hampton Road/Beeliar Drive and Manning Road/Stirling Highway - and found 1575ha could be developed.
"Perth is overstretched and underdeveloped," the report said.
"Perth's metropolitan area is now one of the largest cities in the world by land size - Perth's physical size is now roughly the same as Los Angeles and Tokyo.
"About 1500 people move to WA each week, most of them to Perth. If we are to ensure Perth is a truly liveable city for the 21st century, we will need to find new ways of planning our city."
The report said infill developments along transport corridors could transform "activity centres" into vibrant streets with a mix of housing, job opportunities and services. There could be 94,500 to 252,000 new dwellings.
"The key strength of this concept is that it does not deny Perth residents the choice to live a suburban lifestyle," the report said.
"By focusing development along existing urban corridors, it leaves the suburbs not just intact but improved, since local residents will be within walking or riding distance to significantly more services.
"This concept does not change the established urban fabric of our existing suburbs, it strengthens it."
In the foreword, Senator Ludlam said the divide in city policy between good intentions and built reality was striking.
"We know how to build urban centres that are supportive, sustainable, human-scaled and creative, but for the most part, we don't," he said."Local residents will be within walking or riding distance to more services." *Transforming Perth * *study *
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