Despite the road closures, construction noise and cranes against the skyline, Darling Harbour businesses are feeling positive about the seven-year $3-billion redevelopment of the area.

Tony Carneiro, general manager of the nearby Darling Harbour Holiday Inn, is expecting "at least 20 per cent more business" as a result of the Darling Harbour Live project, which includes a new convention-and-exhibition centre, a theatre and a residential precinct.

Developer Lend Lease has begun work on the massive redevelopment project at Darling Harbour. Credit:Janie Barrett

"We're very excited because it will affect our business straight away," he said.

Buildings in the area have been receiving regular updates on road closures and planned works, but he has yet to receive any significant complaints from guests, Mr Carneiro said.