HIA Affordability Index Hits Record Low in June Quarter 2026. Falling Established Prices Do Not Make New Homes Cheaper to Build.

Falling established prices do not make new homes cheaper to build

HIA released its Affordability Report on Friday 4 September 2026. Senior Economist Tom Devitt said the HIA Affordability Index deteriorated 3.1 per cent in the June quarter 2026, putting Australian housing at its least affordable since HIA records began in 1994.

If your desk read falling Sydney and Melbourne established prices as an automatic lift for new-home feasibility, recast that assumption. Devitt's print separates price falls in the established market from the cost of land, labour, materials, infrastructure, finance and regulation that still govern whether a new project stacks.

This article summarises the published HIA Affordability Report figures. It is not financial, valuation or construction-contract advice.

The national print — record-low affordability, every market worse in the quarter

HIA calculates the Index for each of the eight capital cities and seven regional areas on a quarterly basis, using dwelling prices, mortgage interest rates and wage developments. From the 4 September 2026 release:

• It now takes 1.9 average incomes to comfortably service a mortgage on a median-priced dwelling in the capitals, and 1.8 incomes in the regions.
• An affordable home, on HIA's definition, should be serviceable with no more than 30 per cent of the annual earnings of a single average income earner.
• Affordability deteriorated in every market in the June quarter 2026, even markets where dwelling prices fell.

Devitt: "Even with dwelling prices declining in a number of markets, led by Sydney and Melbourne, rising interest rates continued to push up mortgage costs faster than incomes."

Quarter and year — where the Index moved

June quarter 2026 deteriorations (HIA):

• Worst: Darwin −6.9%, regional Western Australia −6.6%, regional Tasmania −6.0%.
• Most modest: Sydney −0.7%, Melbourne −1.1%, Canberra −1.7%.

Over the year (HIA):

• Only Melbourne improved, and only modestly (+0.1%).
• Worst deteriorations: Perth −19.8%, regional Western Australia −18.3%, Darwin −16.5%, Brisbane −14.7%.
• More modest annual deteriorations: Sydney −3.6%, Canberra −4.2%, regional Northern Territory −4.9%.

Why builders should not confuse price falls with build-cost relief

Devitt's feasibility point is the desk line: when established home prices fall but the cost of land, labour, materials, infrastructure, finance and regulation does not, fewer new housing projects are financially viable. HIA says home buyers — especially investors — have pulled back, with dwelling price declines continuing into the second half of the year, but that is "not the makings of a sustainable improvement in affordability" because it does not fix the demand–supply mismatch.

He also stated there have already been three consecutive monthly declines in contracts signed for new home builds, and that home building volumes are set to be weaker than they would have been without this year's speed bumps and policy mistakes. On the demand side HIA cites elevated population growth, shrinking household sizes and replacement of old stock; on the supply side it argues Australian Government settings have interrupted an expansion that was already underway.

Devitt's closing distinction for the desk: the difference between reducing prices and reducing costs. Sustained affordability, in HIA's framing, needs lower land and construction costs — not temporary suppression of established-market prices.

Practical moves for the next four weeks

1. Recast feasibility off established-price headlines. A Sydney or Melbourne price print does not cut your land, labour, materials, infrastructure or finance cost. Re-run unsigned project models against current build inputs, not against the Index alone.

2. Stress-test the deposit and investor book. HIA says buyers — especially investors — have pulled back. Check which lots and house-and-land packages still clear with realistic deposit assumptions. Do not invent rates or clearance odds.

3. Treat the three consecutive monthly contract declines as a volume signal. Devitt's line is already in the public print. Align crew bookings and supplier lead times to signed contracts you hold, not to last year's run-rate.

4. Keep client and lender conversations on the published HIA numbers. Factual line: Index −3.1% in June quarter 2026 (least affordable since 1994); 1.9 / 1.8 incomes in capitals / regions; every market worse in the quarter; Melbourne only annual improver (+0.1%); Perth / regional WA / Darwin / Brisbane the sharpest annual deteriorations.

5. Separate "cheaper established stock" from "cheaper to build". Do not promise clients that a softer secondary market will lower your contract price. Quote on cost and programme you can deliver.

Bottom line for the desk

HIA's 4 September 2026 Affordability Report puts the Index at a record low since 1994 after a 3.1% June-quarter deterioration. Capitals need 1.9 average incomes to service a median mortgage; regions 1.8. Every market worsened in the quarter; over the year only Melbourne improved (+0.1%). Devitt links three consecutive monthly declines in new-home contracts to falling established prices that do not reduce build costs. Recast feasibility, deposit assumptions and crew bookings on that distinction — not on the secondary-market headline.