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"New Australian research has reinforced concerns that minimum lot size requirements, many of which were introduced to address planning challenges from a very different era, continue to hold back housing supply today," said HIA Executive Director Planning & Development, Sam Heckel.
The research paper, What Local Land Use Reform Does, and Doesn't Do, by the e61 Institute and the Centre for International Economics examined planning reforms in Adelaide's City of Campbelltown and found that reducing minimum lot size requirements increased housing approvals by 67 per cent, with the additional supply largely delivered through townhouses and row housing.
"At a time when governments are struggling to meet ambitious housing targets, many planning schemes continue to impose minimum lot size requirements that limit housing supply and housing choice.
"The impact is not just fewer homes. Restrictive lot size controls often prevent the delivery of smaller and more affordable housing options that can provide an entry point into established suburbs for first home buyers, downsizers and key workers."
The findings support HIA's recent Increasing Gentle Density: Unlocking Subdivision report, which identified minimum lot size controls as a major barrier to increasing housing supply and a conservative reduction of minimum lot sizes could reduce the cost of a new home by more than $200,000 through lower land costs alone.
"Large parts of Australian cities remain subject to lot size requirements that no longer reflect modern housing needs.
"Importantly, this new independent research also demonstrates that when planning barriers are removed, industry responds. The issue is often not a lack of industry capacity, but the planning controls that limit what can be built.
“Australia is already projected to fall well short of the National Housing Accord target of 1.2 million homes.
"If governments are serious about improving affordability and increasing supply, they must be prepared to reform outdated planning controls that prevent land from being used more efficiently.
"There is no shortage of reports, reviews and policy proposals recommending greater housing diversity and more efficient use of residential land.
"What is often missing is the urgency required to translate those recommendations into tangible housing outcomes for Australians struggling to find a home." concluded Mr Heckel.
The housing industry is calling on the Australian Government to allow self-managed super funds (SMSFs) to continue borrowing to build new homes, at least until the impact of its new borrowing restrictions on housing supply is independently assessed and made public.
“HIA welcomes Senator Andrew Bragg putting National Construction Code reform squarely at the centre of the housing affordability and productivity debate,” said HIA Chief Executive – Industry & Policy, Simon Croft.
HIA has welcomed the interim report of the Senate Select Committee on Productivity in Australia, saying it confirms housing affordability and supply are now critical determinants of the nation's economic performance.
Ahead of Victoria's November election, the Housing Industry Association (HIA) is calling on all political parties to commit to one simple, low-cost principle that would provide immediate relief to the state's housing sector and small businesses: do no harm.