like everyone has stated it depends on the installer and the dealer.

One pool dealer told me I didn't need a permit because it is an above ground and can be taken down but another said I did need one if I was going to have electrical and water run to it. I don't have either water or electrical run to my pool. Filled w/ a garden hose and pumps are on a timer that is connected to an electrical cord that goes to my shed. The only thing I remember was the pool had to be 4 ft away from any sold surface (ex , fence , house , shed , patio) and it had to be 3 ft away from any easmant (plumbing line or city lines that they may need access to). My pool is about 3.5 ft from my fence and doesn't go over any easements but I never got a permit. The value of my house will go up and so will taxes. I remember that when I re-did my porch in my front yard.