Im thinking about having my trees topped or reduced in height?
This is almost always a bad idea. No reputable tree service is going to give you an estimate for tree topping. In the early days of arboriculture, it was thought that reducing the height of trees made them safer and healthier. Studies have proven the topped trees often die from these wounds, and many times end up taller then they would have otherwise been. Please don’t do this to your trees as you will forever ruin their appearance and most surely regret it. For more information see ISA’s Guide to Why Topping Hurts Trees.