It can vary as to whether it will add value to your home when adding a privacy fence.
However when privacy fences are added to the back of the home to enclose the backyard they almost always add some good value to the home and increase resale value of the home.
But when you add a privacy fence in front of the home then it might actually decrease the value of the home by reducing curb appeal.
Still some people love privacy fences all around the home while others only like the privacy fence in the back yard area of the home.
I added a privacy fence all around my home though because it actually increases the security of the home and I like the privacy as well.