Weekly Market Update: Sydney’s Worst Week in 2026 and the Affordability Index Explained

Last week was the worst week for the Australian property market in all of 2026. Sydney fell almost half a percent in seven days. But the more useful question is not what happened this week. It is how far each market actually falls from here, and Lachlan Delahunty has the affordability index data to answer it precisely.

Sydney: The Worst Weekly Fall on Record in 2026

Sydney’s weekly decline set a 2026 record. The prestige market is taking the hardest hit, with upper quartile assets falling significantly faster than the affordable end. The mechanics are straightforward: buyers at the prestige end have more discretion, more alternative options, and face higher borrowing constraints at current serviceability rates. They are withdrawing more quickly and pushing harder on price than buyers at the sub-$1.5M level, where competition remains active.

The SMSF lending window closing at the end of June may have contributed to the intensity of the past few weeks, with forced sellers from that pool hitting the market simultaneously and compressing vendor confidence across the city.

The Affordability Index: How Far Each Market Can Fall

The affordability index measures the share of average wage consumed by the average mortgage repayment. Lachlan’s analysis is specific: on current numbers, Sydney sits well above its historical ceiling and would need to fall approximately 12 percent to return to it. Melbourne sits well below its ceiling with meaningful runway remaining before it reaches affordability constraint. That distinction explains why Follio is cautious on Sydney and active on Melbourne, and why the sub-$1M Melbourne market is one of the strongest in the country right now despite the median continuing to slide.

Brisbane, Darwin and the Next Cycle

Brisbane is approaching its affordability ceiling faster than most commentators acknowledge. The oversupply risk in Brisbane’s outer ring apartment market is building. Darwin, despite what buying groups are pushing, sits in a structurally different position to Perth: the demand drivers are thinner and the liquidity is lower. Lachlan closes with his assessment of where the next cycle is likely to begin, and why Melbourne is the most compelling candidate for market leadership heading into 2027.

Published: 18 Aug 2026