How much does it cost to live in one of the priciest residential buildings in Chicago? It'll cost you at least a couple million bucks to snag a condo or co-op in one of these ten buildings. Over the years, real estate agent Fran Bailey has been keeping track of the priciest sales in the city's most expensive buildings, and after crunching the numbers, Bailey has determined that these places were the priciest in Chicago last year. However, to be counted, buildings had to have at least two publicly listed sales that closed in 2016. A number of buildings from last year's list returned, while some new entries made a big splash on the scene. Here's a quick look at which Chicago buildings were the priciest in 2016.