property taxes in the suburbs of denver are on the order of .5% a year. compare that to the suburbs of chicago where they're north of 2% a year. the school quality and education provided are AT LEAST SIMILAR.
the difference in cost is a product of two things: pensions and legacy costs (overly rich in chicago), and population growth. chicago has become a game of musical chairs where the last man standing has to pay the retired teachers. north shore property values reflect this reality.