An additional 300 residences have been added to a flood support scheme in Queensland — bringing the total number of potential repatriations to 800 houses — as demand for support surpasses the government's initial expectations.

The $741 million Resilient Homes Fund was rolled out in response to south-east Queensland' flooding disaster in 2022, with three separate programs within to retrofit, raise, or buy-back homes.

The fund was originally projected to help 500 homes, but Deputy Premier Steven Miles said demand has been higher than predicted.

"We've been able to more accurately anticipate what the best solution for those properties are," Mr Miles said. 

On Sunday, the government announced 300 additional homes across south-east Queensland will be repatriated by money earmarked — from the total $741 million — for raising and retrofitting Queensland houses.

Applications for the buy-back scheme have already closed, so the additional homes will be assessed from the pool of pre-existing applications.

So far, 491 of the original 500-homes have been valued for their buy-back. The government has made 473 offers — 370 of them were accepted, 238 have been settled, and 48 already demolished.

The multi-million-dollar scheme is being jointly-funded by the state and federal governments, which Federal Minister for Emergency Management Murray Watt said is a win-win. 

"By making these sorts of investments with state governments, we can protect home owners and also protect taxpayers from those future costs," Mr Watt said of the disaster relief.

Leader of the Queensland opposition David Crisafulli has welcomed the announcement, but wants the program extended to the entire state.

Applications for homes to be raised and retro fitted are still open, and close at the end of July.