The ABS data showed 4,814 homes were built across Western Australia in the June quarter, down 6.3 per cent from the previous quarter and 12.9 per cent lower than the same period a year earlier.
Opposition housing spokeswoman Sandra Brewer described the result as "appalling" given the state's housing shortage. "A decade ago, WA completed more than 32,000 homes in a year. Today, despite a much larger population and enormous demand, we are nowhere near that level," Brewer said.
The figures indicate the state is slipping further behind the targets set under the National Housing Accord, a federal-state agreement aimed at boosting housing supply across Australia.