An in-ground swimming pool can be a beautiful addition to any property. If youre considering having a in-ground pool installed you should think about all the expenses that can occur with pool projects before diving in in a pool. In this document we have taken a cost averaging methodology to give you an idea of the costs related to a pool installation project. The total cost of a in-ground swimming pool can vary from state to state and each installer will have different fees. This information is to be used as a general guide for understanding the fess involved with a swimming pool installation.