Excavation works at James Packer's 71-storey Sydney casino complex are expected to begin soon after the project was given the final tick of approval.

The original Crown Resorts proposal for a $2 billion high-end hotel and casino at Barangaroo were substantially modified, before being signed off by the NSW Planning Assessment Commission on Tuesday. The changes, already endorsed by the NSW government, include a widening of Hickson Park near the eastern side of the…