Billionaires have been proving that dropping thousands for each square foot of a luxury home isn't out of the question, with some market prices reaching record-breaking heights — like America's most expensive home in Greenwich, Connecticut (going for $190M). Considering Greenwich is known to attract Wall Street tycoons, it's not too surprising to see such a high-priced property up for grabs, but it did get us thinking about where in America you can find the most expensive real estate markets. According to market data collected by Coldwell Banker, California reigns supreme, with New York, Hawaii and Connecticut filling in the gaps.
