NEW YORK (AFP) - A luxurious New York apartment furnished with bullet-proof panic rooms and a sushi island bar is on the market for an eye-watering US$48.5 million, (S$66 million) reportedly the property of Saudi royalty.

The palatial pad, which straddles three floors and has two inbuilt salt-water aquariums, offers a tantalising glimpse into custom-made luxury on offer in New York's cutthroat property market.

US media named the owner as Saudi Prince Nawaf bin Sultan bin Abdulaziz al-Saud.

The Wall Street Journal said the Prince was the principal of the corporation listed as the apartment's owner.

The 20-room apartment takes up 10,500 square feet and has four bedrooms and 10 bathrooms on Manhattan's Upper West Side, according to the listing from Douglas Elliman.

It comes with a jacuzzi, gym, venting cigar room, billiards room, massage and treatment room, steam room and pedicure tub, the listing said.

Described as "one-of-a-kind" with an "opulent" finish, it commands stunning views of the Hudson River and has a dining room that can seat 16.

Alcohol may be illegal in Saudi Arabia, but the lounge boasts a marble-topped bar which, according to the listing, "invites one to cozy up and enjoy a cocktail as the sun sets".

There is another full bar downstairs to service the hot tub.

The master suite includes a spa bath and steam shower, private sitting room, grooming room and twin powder rooms.

The apartment's heat, air-conditioning, lights and music can all be controlled remotely by the touch of a tablet or smartphone.

The triplex is in the 31-floor Heritage building at tycoon Donald Trump's eponymous Trump Place just steps from Riverside Park.

Douglas Elliman refused to comment on the owner but The Wall Street Journal quoted a rival agent as saying he rarely used the apartment, and was therefore selling up.