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About 5600 new social and affordable homes will be built in Queensland within five years under a plan unveiled at the state housing summit.

Premier Annastacia Palaszczuk told attendees at Thursday's summit in Brisbane that the state's Housing Investment Fund will be doubled to $2 billion.

She said annual returns of $130 million will support the construction of 5600 new social and affordable homes by 2027, on top of the 6365 promised by 2025.

"That's a good portion of money that's dedicated for building new homes," she said.

"This additional investment also recognises the impact that rising cost of building materials and labour is having on prices right across the construction sector to secure much needed additional supply."

The Queensland Council of Social Services welcomed the announcement, but called for a clear plan to help an estimated 46,000 people on the government's housing waiting list.

Chief executive Aimee McVeigh said that plan should have measurable targets, which all three levels of government are held accountable for, and a goal of ensuring every Queenslander has a home within a decade.

"We have tens of thousands of Queenslanders facing or experiencing homelessness amid a housing crisis that is only getting worse," Ms McVeigh said in a statement before the summit.

More than 100 representatives from three levels of government - and from social services, charities, property, construction and industry bodies - are taking part in Thursday's summit.

Short-term rentals, interstate migration, planning rules, land use and social housing are set to be examined at the one-day event.

"I want my government to work closely with local governments to come up with answers," Ms Palaszczuk said.

"I want our government to be working with every single stakeholder in this room and every stakeholder in the state, so that no family faces the prospect of living in unsafe and insecure accommodation.

"Friends this is not an issue unique to Queensland, it is an issue that is affecting families across the nation, but, and this is crucial, we can find local solutions and answers that are unique to our state."

© AAP 2022

About 20,000 homes have been withdrawn from Queensland's rental market in recent years without a clear explanation, the state treasurer says.

Cameron Dick has told attendees at Thursday's housing summit that Queensland should have 55,000 more rental dwellings than it currently does.

Treasury analysis found much of the shortfall can be attributed to rental properties being bought by owner-occupiers, a slow-down in construction of new homes or being taken out after being damaged in recent floods.

However, Mr Dick said the analysis found a shortage of 20,000 rental homes "cannot be explained by available data."

"In my language that is: we don't know," he said.

"So, I've asked Treasury to keep looking and try and explain to me the available data, I've asked officials to keep looking at that issue.

"But what's happened in the housing market very unique, very unusual, and has not happened before in Queensland."

The missing rentals could be explained by people using their investment properties to work from home during the COVID-19 pandemic, or holding them for sale or for use as holiday homes.

However, Mr Dick said shortfall hasn't necessarily been caused by an uptick in short-term rentals.

Earlier, Premier Annastacia Palaszczuk said about 5600 new social and affordable homes would be built by 2027, on top of the 6365 promised by 2025.

She said the government will double its Housing Investment Fund to $2 billion, which will create annual returns of $130 million to be invested in dwellings.

"That's a good portion of money that's dedicated for building new homes," Ms Palaszczuk said.

"This additional investment also recognises the impact that rising cost of building materials and labour is having on prices right across the construction sector to secure much needed additional supply."

More than 100 representatives from three levels of government - and from social services, charities, property, construction and industry bodies - are taking part in Thursday's summit.

Short-term rentals, interstate migration, planning rules, land use and social housing are set to be examined at the one-day event.

Tenants Queensland CEO Penny Carr told the summit the tight rental market has left tenants vulnerable to rent rises.

"We had two clients ... one had a $170 a week increase, and the other had a $120 a week increase," she said.

"They were both in the market with the same landlord for five and six years."

Planning Institute of Australia's Matt Collins said policymakers should put more focus on security of tenure, rather than solely home-ownership.

"(So) they're not at risk arbitrarily of having that tenancy end and having to relocate ... particularly in a market like we have now that can have really significant impacts," he said.

© AAP 2022

Jury deliberations are continuing in the trial for the man accused of raping Brittany Higgins after detailed instructions from the chief justice overseeing the case.

A jury of eight women and four men will decide a verdict in the criminal trial of Bruce Lehrmann, charged with sexual intercourse without consent.

He has pleaded not guilty and has faced an almost three-week long trial in the ACT Supreme Court.

Ms Higgins alleges Lehrmann raped her inside a ministerial office in Parliament House after the pair went out drinking with colleagues.

Lehrmann denies any sexual interaction took place.

Chief Justice Lucy McCallum provided detailed instructions to the jury before they began their deliberations on Wednesday afternoon.

She reminded jurors that Lehrmann was presumed innocent unless or until his guilt is proven by the prosecution beyond a reasonable doubt.

She told the jury it must act impartially, without emotion or prejudice and give a true verdict according to the evidence presented in the courtroom in the past three weeks.

"You are not answerable to popular opinion ... whichever way you may think it sways," she said.

"Your verdict, whether it be guilty or not guilty, must be unanimous."

The chief justice summed up the prosecution and defence cases and said it was up to the jury to decide which evidence they did and did not accept.

But she warned them not to invoke any stereotypes they may hold about an event or situation they have not experienced personally, saying there was "no template" for life.

"Be careful about speculation and pre-conception ... be careful not to make assumptions about how a person may behave in circumstances you have not experienced," she said.

Lehrmann exercised his right to silence and did not enter the witness box during the trial. The jury was instead played his police interview.

Chief Justice McCallum said his decision not to give evidence in court could not be used as an admission of guilt and did not strengthen the prosecution's case.

She also said Lehrmann's agreement to do a police interview did not shift the burden of proof to him.

The jurors will continue deliberations until they can reach a unanimous verdict.

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© AAP 2022