Commercial property markets across a number of capital cities throughout Australia including Brisbane, Adelaide and Sydney appear to have tanked as demand has plummeted and more stock comes onto the market, the latest report suggests.

In its latest Office Market Report, the Property Council of Australia says average national vacancy rates across Australian CBDs shot up from 8.1 per cent in January to 10.1 per cent in July as a the volume of space occupied and committed dropped by 126,355 square metres even as a…