Australian Greens housing spokesperson Senator Scott Ludlam has urged the state and Federal governments to work together on urgent action to address homelessness, as figures show the public housing wait list has doubled in Western Australia and 105,000 Australians are homeless.

The Greens welcomed the long-delayed release of the Federal Government's draft legislation on homelessness this week, and urged the Government to take immediate action to tackle the crisis.

Greens housing spokesperson Senator Scott Ludlam said the Bill represented a more realistic understanding of homelessness, but a more detailed analysis is needed to identify potential improvements.