Restrictions on who can live in granny flats will be removed so secondary dwellings can be rented on the open market, according to Premier Annastacia Palaszczuk.
"I know the rental market is tough and, right now, homeowners can't rent secondary dwellings to anyone other than immediate family," Ms Palaszczuk said in a Facebook post on Friday.
"Changing this will mean many cheaper properties will enter the rental market, helping thousands of people across our state."
As it stands, only relatives can live in granny flats, Planning Minister Steven Miles said.
"Increasing housing diversity means more affordable housing options throughout the state," he said.
"That's why we're allowing homeowners to rent spare rooms and granny flats."
The change follows a roundtable held last week ahead of a housing summit on October 20.
Other potential changes include minimum requirements for affordable housing in new developments, and stakeholders say there needs to be significant increases in social housing levels.
At least 5000 new social housing dwellings need to be built every year for the next decade to solve the crisis, the Queensland Council of Social Service has said.
"Right now, we have about 50,000 people waiting on the social housing register and a growing number of Queenslanders presenting to community services desperately needing help with housing," chief executive Aimee McVeigh said last week.
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