The thesis aimed to examine the problem of excessive moisture in existing buildings and to design a suitable construction and technological procedure including the analysis of particular options and their economic analysis. For this purpose I chose a particular family house with excessive moisture. I elaborated basic characteristics of the building, where I described the age of all parts affected by moisture. Next I described used material, that was incorporated into the ground plan of the house. To make a complex view I described the surroundings of the building as well. Apart from that I worked out a basic reconnaissance of the bedrock, which included the analysis of radon threat analysis. Furthermore, I described the moisutre manifestations in the building and their possible causes. Based on this analysis I suggested a construction and technological procedures consisting of two solution options, which were in detail described and incorporated into the ground plan of the building. I calculated the costs of both solutions and finally the most suitable solution was chosen with a corresponding proper explanation.