Thank you for all of your insight...I guess I am reading some more....and the permit, since I am having the pool installed I do need that permit or they will NOT install. My backyard is 120 x 220 and I just had a tree removed out of the only two (2) that I had since both were 40 ft from the house. Now all that is my way is the one (1) tree and the shed in my back yard. The install contract said that within one (1) year they will re-install the pool if it is more than 1" out of level.