Social media conversations on house prices are dominated by the opinion that they are unsustainably high.

A media analysis by research firms 360M and Brandtology has found social media participants remain convinced house prices are too high, and will have to drop if new owners are to enter the market. The report also indicated that social media users respond favourably to media reports painting Australian housing as unaffordable.

"In social media the concern remains sharply on the continuing difficulty of entering the housing market and the still record levels of house prices as a proportion of incomes, despite the relative flatness of the housing market in recent years compared to the rest of Asia," the report said.

The analysis also found online sentiment was "considerably more negative" than the mainstream media about government policy on housing, as well as Australia's economic prospects.