A smaller south cove and parkland shifted from the harbour is the price Sydneysiders will pay to bring Barangaroo's landmark hotel back on dry land.

The Barangaroo Delivery Authority's latest proposals for Sydney's biggest CBD development show how buildings and public space will be reshuffled to fit James Packer's proposed hotel and casino complex.

The plans also reveal new ambition for Central Barangaroo, including a grand civic staircase between the development site and Millers Point, a new plaza, 30-metre-wide foreshore walk and sites for a future cultural venue.

The Central Barangaroo master plan also proposes to double the floor area within current approved building heights and footprints to 120,000 square metres to support a ''greater diversity'' of residential, commercial, cultural and educational uses.

''Central Barangaroo will be a new place for Sydney to celebrate by the harbour,'' authority chief executive John Tabart said.