New Zealand might just hold the key to solving Australia's housing supply mess.

Zoning reforms across the ditch provide a template to boost dismal construction productivity and help the industry reach its supply targets, a research paper by economic think tank e61 Institute has found.

Labour productivity in the construction sector - essentially how many homes are built per hour worked - has declined since 2000 in Australia, adding to the time and cost it takes the industry to provide supply.

New Zealand is unique among Anglosphere nations in having experienced substantial growth in construction productivity since the turn of the millennium.

Productivity growth surged in Auckland and Upper Hutt, near Wellington, immediately after they were 'upzoned' in the mid-2010s, relative to the

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