Brisbane will attract a greater level of investor attention in coming months, driven by the "good value" still to be found here, according to one of the country's big four banks.

The quarterly National Australia Bank housing market report found growth in house values in Brisbane (6.4 per cent) had severely lagged the combined capital city benchmark (9.3per cent), but it also made it more attractive.

Brisbanes value growth performance has lagged its southern neighbours, creating a significant gap in housing prices between Brisbane, and Sydney and Melbourne, the NAB report said. As a result, we expect further growth in Brisbane home values over coming months, as well as growing interest from investors.

NAB found investment lending made up more than a third of the total portfolio in the state.

Over the past year, investors have averaged a record high 39 per cent of all housing finance commitments (nationally), which is the highest proportion of lending to the investment segment on record, the report said.

NAB home lending general manager Melissa Reynolds said Brisbane had affordability and attractive rental returns, and there was investor interest driving inner city apartment sales.

Median house values are more affordable compared to Sydney and Melbourne, and this is starting to generate greater interest, with sales activity 14.9 per cent higher in 2014 than 2013.

She said with the outlook for capital growth in other markets diminishing, and gross rental yields for houses above 4 per cent and units above 5 per cent, investor activity within Brisbane had picked up. But she warned regard should also be given to the level of planned and under construction projects, with potential for oversupply developing in the future.