More than one in five new homes approved across Australia in the year to June 2026 were built in areas already grappling with high mortgage stress, according to new OurTop10 Pressure Corridors research.
Of the 51 council areas analysed, 38 growth-corridor councils recorded mortgage-stress rates above 50%, and together accounted for 46,557 home approvals — 23% of the 205,249 approvals recorded nationally.
Logan in Queensland topped the list of high-strain councils for building activity, with 5,035 homes approved at a 70% strain rate, followed by Wanneroo in WA (4,017 approvals, 89% strain), and Ipswich in Queensland (3,522 approvals, 67% strain).
Several councils in the top 10 recorded strain rates above 90%, including Liverpool in NSW (98%) and Camden in NSW (92%), while Blacktown in NSW posted a 100% strain rate alongside 2,415 approvals. Brisbane City recorded the highest approval volume of any council overall, at 9,237, though it was assessed separately as a capital-city council rather than a growth corridor.
This concentration of new building comes as mortgage stress intensifies nationally.
Separate OurTop10 modelling found mortgage stress across Australia's hardest-hit postcodes climbed to 421,725 households by June — a 14% quarterly rise — with OurTop10's Mansour Soltani, commenting separately on the firm's Q2 national stress data, noting the pressure is "no longer confined to Australia's outer suburban growth corridors," with financial strain now also building in blue-chip Melbourne and Sydney suburbs.
Against this backdrop, the type of housing being delivered matters as much as where. The research found that detached houses made up 76% of approvals in these high-stress councils, or 35,453 homes, compared with just 24% for townhouses, units and apartments.
Soltani said this pattern runs counter to government messaging on housing density.
"Governments keep talking about building up, but the approvals show we're still building out,” he said. “Three in four homes approved in these high mortgage-stress councils were detached houses, concentrating even more development in communities where existing mortgage holders are already under significant financial pressure."
Soltani said the concentration of new supply in these corridors creates a growing divide between established borrowers and those entering the market.
"Increasing supply doesn't do much to ease the pressure on people who already have a mortgage,” he said. “Their repayments don't change because a new estate is approved down the road. So, we end up with two groups in the same postcode: households who are already stretched, and new buyers arriving with small deposits who are the most likely to end up in the same position."
This tracks with OurTop10's broader national modelling, which also flags outer-suburban households facing high transport costs and highly leveraged investors as being at heightened risk.
The report is careful to note it found no causal link between new construction and mortgage stress. Rather, it highlights that a large share of new housing is being delivered in the same fast-growing corridors where financial pressure is already most acute.
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