Inside America's luxury bomb shelters: The underground homes which have enough space for pools, basketball courts... and even private jets

Hi-tech underground survival shelters -are going through a boom since the panic over the Mayan calender and the purported end of the world last year

Now, some developers create 100,000 square foot underground homes that could also potentially house families for year - in the unlikely event of a disaster.

'You can have all your major amenities: TV, high power and high voltage (appliances)... horticulture rooms where you can grow vegetables and gardens, a full shower, all the amenities of your full home,' said Brad Roberson, marketing director for Rising S Company, which builds and installs custom shelters. 

'We're not limiting what people can do.'

A basic 'starter' bunker 10 feet by 20 feet starts at $54,000 explained Roberson, while the most expensive bunkers on offer go up to $10 million .

'Budget and imagination are the only limits,' said Roberson to ABC News.

Another firm who produce corrugate pipe shelters are Utah Shelter Systems - offering an eight foot diameter by 32-foot length shelter for $50,000.

The luxurious bomb, nuclear and chemical weapon proof bunkers are kitted out with beds, kitchens, flushing toilets and even fireplaces. Ron describes them as 'recreational bomb shelters' and sells them for an average price of $75,000

The 50ft long survival shelter is put in place before earth is piled on top to cover it in Montebello, California

A view of the luxurious living area complete with leather sofa, plasma TV and wood flooring in Montebello, California

A view of the beds in the survival shelter in Montebello, California

A view of the luxurious dining area inside the survival shelter in Montebello, California

Rising S constructed an $8 million shelter in Colorado that measured 15,000 square feet with camouflaged elevators and ramps for the disabled owner.

Above ground a log cabin is built on top of the shelter so that no one is any wise about what exists below ground.

'Everything above ground is camouflaged by an old barn or water silo that sits above it,' said Roberson to ABC News.

'He's got a basketball court, and airplane hangar large enough to park 2 Cessna planes that will open up to face a hill or mountain. 

'He's got a large gym, 22 rooms, he has a large family.'

One of the bedrooms with double bed inside the survival shelter in Montebello, California

A child powers the water pump in a survival shelter in Montebello, California

The majority of the boom in shelters is concentrated around the South and West of the nation.

'I think probably around the year 2000 we started seeing quite an increase in sales,' said Sharon Packer, co-owner of Utah Shelter Systems in Draper, Utah. 

'People were concerned about the very real issue of possible effects on our computers. 

'Y2K' started the upsurge, and for 13 years it's been a good steady business,' Packer said. 

'After 9/11 we had a big surge in the East, in New York.'

Indeed, the recent nuclear posturing by Iran and North Korea has ramped up dears and business.

'It's sad to say, the worse the state of affairs get, our government gets, the closer we see these policies the government is forcing down our throats, and foreign threats as well. It inflames peoples' desire to give themselves a retreat,' said Roberson to ABC News.

Children test out the bunk beds in the survival shelter in Montebello, California

'People are awakening to the threat,' Packer said. 'A lot of it is the terrorist attacks, a lot of it is the economy. People are concerned about having a government failure. Some of it is Earth changes.'

The owner of American Safe Homes, Brian Duvaul says that during the last quarter of 2012 he witnessed a 25 percent increase in business, which he attributed to the Mayan calendar which purported to herald the end of the world.

He also said he had previously seen jumps in sales during the anthrax scares of 2002 and 2003, and after the Fukushima nuclear plant meltdown in Japan in 2011. 

'People don't always come out and tell us why they're doing what they're doing. We had one guy tell us he had to get a blast door for his wife's birthday, which happened to be one day before the Mayan calendar ended,' said Duvaul to ABC News.

'I didn't believe him, but we got him the door.'