A LAVISH new yacht recreating the billionaire's playground of Monaco is set to become the world's most expensive.

The staggering 155m Streets of Monaco yacht is expected to cost over $1.1 billion to build and is modelled on a section of Monte Carlo.

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Currently in the design stage, the super-ship will feature smaller versions of the state’s famous landmarks such as the Monte Carlo Casino and racetrack, as well as swimming pools, tennis courts, a cinema, a go kart track and a Hotel de Paris.

Instead of traditional decks the one-of-a-kind ship will have buildings, and instead of a swimming platform it will have a beach.

Travellers will also spot waterfalls, a swim-in Jacuzzi-bar, helicopters and submarines on board.

The one-of a kind ship could be home to 16 guests and 70 crew with the main apartment spread over three floors and 445 sq m.

Linking upper and lower living areas is the Atrium – featuring seven guest suites, a bathroom, bedroom, dressing room, reception and balcony.

The idea for the super-boat, designed by Yacht Island Design, was sparked by car racing and developed into something more innovative.

"It is basically a floating city,” company director Rob McPherson said.

"The design theme called for a unique yacht that reflected the style and sophistication of the principality.

"We want to create a truly unique environment that could take the principality of Monaco to the ocean."

The ship will exceed the $1 billion price tag reportedly paid by Roman Abramovich for his Eclipse yacht.

A second creation by Yacht Island Design will be a smaller 85-metre yacht based on a Pacific Island theme.

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