privacy fences - 6ft vs 8ft - AnandTech Forums.19 Mar 2015 . our backyard is laid out so that the house behind us is up hill from us, and they have a deck out there as well. so on their deck they sit up pretty high. because of this we decided to get an 8ft fence instead of the normal 6ft fence. luckily our sub division is one of the few in our county that allowed it.