This is according to Bill Randolph, director of the city futures research centre at the University of New South Wales, who was responding to the latest state government population projections.
It is expected that Sydney's population will expand by 1.6 million in the next two decades, which Mr Randolph says means at least 600,000 new homes will be needed in the city by 2035.
He told the Sydney Morning Herald that this could lead to young families being pushed out of the city unless enough property is built to meet the needs of the growing Sydney population.
Recent data shows average house prices in Sydney have also increased by more than a third during the last 12 months.
Professor Peter Phibbs, the chairman of Urban and Regional Planning and Policy at the University of Sydney, added: ''We need a planning system that will help facilitate housing production at a range of price points - the current focus on just hoping that expanding supply will fix everything will not succeed."
Posted by Steve Douglas