A small parcel of land at South Brisbane could undo the $944 million Brisbane Metro project, but Brisbane City Council’s transport boss says he is confident the transport project will go ahead as planned.

The council released detailed design for the Brisbane Metro station at the at-capacity Cultural Centre station, which included a 1600-square-metre parcel of land the council does not own.

Concept images for the new Metro Cultural Centre station at South Brisbane, as part of the council's Brisbane Metro plans.

The parcel of land is currently owned by the state government.

The council requested, in writing, the land be transferred to its ownership in September 2017 but almost seven months later the land is yet to be given to or purchased by the council.