More people will have access to the premium gaming area in the revamped Adelaide Casino under approved changes, the South Australian Government has revealed.

The go ahead for the casino's planned $330 million expansion was confirmed today.

In a bid to compete in premium gaming markets several changes to the casino's running have been approved by the Independent Gaming Authority, the State Government said in a statement this afternoon.

The changes include increasing the number of guest passes given to a premium customer to high-roller areas from one to four and decrease the amount needed to be classified a "premium customer" from $12,000 to $8,000 a year.

Premium gambling areas are less regulated and taxed.

"A majority of these initiatives have been designed to attract more interstate and overseas tourists to South Australia and for the Adelaide Casino to better compete with casinos interstate and overseas," the Government said.

"The Government has been very clear with the Adelaide Casino that they must have systems in place to identify and prevent problem gamblers from accessing premium gaming areas."

Casino will be 'mini Trump-like tower'

Senator Nick Xenophon said the definition of high roller "seems to be very rubbery at best".

He said the expansion would "cannibalise" the revenues of small and medium-sized businesses and drive a rise in problem gambling in Adelaide.

"This expansion is going to be a misery magnet for gambling addicts," he said.

The original "no pokies" MP said Adelaide had so far avoided a gratuitous, glitzy American-style casino complex.

"Until now we've had a fairly low-key casino visually. This will turn it into a mini Trump-like tower."

More hotel rooms added

Most of the redevelopment plans had already been flagged, however the Skycity Entertainment Group said this morning "careful consideration" had been given to a number of aspects.

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That included a decision to increase the number of hotel rooms in the proposed development from 89 to 123 and adding an additional floor to the plans for the expanded building.

New restaurants and bars — including a rooftop bar — and function spaces for up to 750 people have also been confirmed.

"We've taken a fresh look at both our existing building and the design for the expansion," Adelaide Casino general manager Luke Walker said.

"We've redesigned interiors, revitalised social, entertainment and gaming spaces, and relocated restaurants and bars."

The redeveloped casino is a key part of a revamp of Adelaide's Festival Plaza and riverbank. ( Supplied: SA Government )

Mr Walker said the go-ahead came after lengthy negotiations with the South Australian Government.

"It's now locked and loaded, this is a monumental occasion for us," he said.

The casino said there would be no additional gambling licences under the expansion, and the same regulations and oversight would continue.

Infrastructure Minister Stephen Mullighan said the negotiations focused on access to VIP gaming rooms.

"What has changed is giving them greater access to the number of people who can come in and access those premium gaming areas," the Minister said.

"So it's more about being able to attract more people into the facility rather than what level of tax they'll be paying to the Government."

He said there was no government financial incentive to secure the deal.

Early works have already begun, with the expansion of the Casino to start early next year and the upgrade due to be completed in 2020.

Skycity said up to 1,000 jobs would be created during the construction phase and there would be 800 jobs at the Casino after the facelift was completed.

The redevelopment is part of a broader plan to revitalise Adelaide's Riverbank area.

The state's Development Assessment Commission has already said it was satisfied the proposals met key objectives of the plan.