Rooftop gardens and bars may no longer be counted as an entire storey in new developments as Brisbane City Council progresses legislation changes in a bid to encourage more green space.

The council decided to progress a major amendment to its City Plan at Tuesday's council meeting to encourage more rooftop gardens and vertical green spaces in new developments, by no longer counting rooftop green space as an entire storey.

Council is looking to amend how rooftop gardens are viewed in development decisions. Credit:James Alcock

Lord mayor Adrian Schrinner told the chamber it was good to see the tops of buildings previously only used for equipment transformed into green spaces and pool facilities to help take advantage of Brisbane's climate.

"We were aware that one of the issues here is that by activating rooftop, in certain circumstances it was designed to be an extra storey, although there were no apartments being provided on that top level and it was simply just a space for residents," Cr Schrinner said.