Property data firm Cotality has released its monthly national Home Value Index (HVI) showing a 0.9 per cent fall in August.
This marks the fifth straight month that Australian property prices have slipped.
The data also shows the nation's housing downturn has accelerated, as most suburbs recorded weaker auction results in the final month of winter.
The country's median property value is now 3.6 per cent below the record high in March.
Sydney continued to lead the pace of declines, with home values down 1.4 per cent in August to be 7.1 per cent below peak levels recorded in February.
"The combination of a sharp drop in demand and higher than average advertised stock levels are weighing more heavily on Australia's largest housing market,"
Prices in Melbourne and Canberra both fell 1.1 per cent, while Brisbane dropped 1 per cent.
The other mid-sized capitals were not far behind, with Adelaide and Perth home values dropping 0.8 per cent in August.
Trend expected to continue
Independent economist Alan Oster pointed to some large geographical differences across the national housing market.
"If you go to Perth, they're still going at an annualised rate of 20 per cent," Mr Oster said.
"If you're in Sydney and Melbourne, they're sort of going backwards at around 7 to 8 per cent.
"I suspect those sorts of trends will continue for a while."
The national property market has been hit by several headwinds in recent months, including three Reserve Bank interest rate hikes, and the federal government's decision to restrict negative gearing and increase capital gains tax.
Cotality said more expensive houses continue to record larger declines.
Mr Lawless said the latest figures show the downturn was no longer confined to select markets or higher-value segments.
"What started as a more concentrated easing across higher-value segments has now become a much more generalised softening, with the vast majority of capital city suburbs recording some level of decline,"
Fewer people inspecting houses
Ray White chief economist Nerida Conisbee said "uncertainty" was the dominant theme in the housing market.
The real estate agency tracks about 13,000 open homes each week.
"We can see that buyer activity is particularly low," she said.
"Last year, we were seeing on average around four people attending open homes. This year, it's sitting at around two people."
Ms Conisbee said fewer properties were coming to market.
"Even though buyer activity is slow, it's leading to very few sellers coming out," she said.
"It may sound like bad news, but it does show that we're not really seeing distress amongst owners."
Read the full article at abc.net.au.