text: These extraordinary images show how an enormous jumbo jet has been converted into a luxury home for a mystery billionaire - complete with bedrooms, multiple lounges and an onboard restaurant. The custom-built Boeing 747 is believed to have cost its ultra-wealthy owner £400million after it was customised to fit his specifications exactly over a three-year period. The jumbo jet would normally carry as many as 600 passengers - but this version was built for just a single tycoon, although he will be able to fit dozens of guests. It contains a large dining room where travellers can enjoy meals cooked in an adjoining kitchen, with a lounge and 'state room' at the back of the plane. More sleeping space is provided in the 'aeroloft' on the top deck of the vessel, with eight full beds for passengers who prefer to get some shut-eye on flights. Luxury: This is the lounge on board a custom-built Boeing 747-8, as depicted in an artist's impression by Greenpoint Technologies . Shuteye: The master bedroom of the £400million plane has a huge bed as well as an armchair and sofa for when the owner needs to relax . Business: The conference room of the plane could be perfect for meetings in the sky with its long table in the centre . Chill-out: The lounge decor looks like a luxury hotel, belying its true location inside a plane similar to those used by commercial airlines . Executive: This room, which can be used as an office or a guest bedroom, gives a hint to its true location thanks to the porthole-style windows . Kicking back: The main suite could easily be mistaken for a room in a top hotel thanks to its over-the-top decorations . Restaurant: The central portion of the plane hosts a dining room which is attached to a kitchen, allowing the owner to make use of the services of a private chef . Shiny: The jumbo jet is one of the most luxurious private planes ever built, with the price tag believed to have reached a total of £400million . Sofa: Parts of the plane are set aside for guests to relax while watching television, as the vessel can carry several dozen passengers . Plush: Another artist's impression of the main state room, which also contains a desk so the owner can switch between work and relaxation . Welcoming: Images of the lounge show a space very different to the normal aeroplane cabin, with the traditional rows of seats completely discarded in favour of a hotel-like ambience . Exclusive: Few people can ever imagine flying in this sort of luxury - far more glitzy than first class on commercial flights . Plan: The layout of the Boeing 747 is shown in this plan published by Greenpoint Technologies . Gigantic: The luxury interior has been built inside a Boeing 747-8 similar to this one, which can hold up to 600 passengers .
target: Boeing 747 can normally hold up to 600 people but this model was customised for a single ultra-wealthy tycoon .
  Digital images show how the interior is as luxurious as an expensive hotel room despite space constraints .
  The jumbo jet contains a master bedroom, 'aeroloft' with added sleeping space, and a large dining room .
  It is also kitted out for business with a conference room and office so the owner is never out of touch with work .