Make sure that you will get your enjoyment out of it. From an appraisal standpoint, they are notorious for not even returning their cost, much less adding value, when the home is sold. Here in Birmingham, my memory is that they typically add about half of what they cost. Montgomery and points south, that ratio goes up. (warmer days, a longer usable season) There are a fair number of people who won't even consider a house with a pool, between the danger, liability, and expense.