Due to increasing energy prices alternative sources for energy are becoming more and more attractive. Next to other sources like solar power or wind power, geothermal energy is becomig of greater interest. Energy generated with geothermal systems can be used for either heating or cooling and is a good alternative to heating or cooling systems which use heating oil or electricity. In the course of this thesis the construction of geothermal systems is explained. Apart from the legal regulations, this thesis elaborates particularly on the working steps at the construction site for such a system. Pipes are placed into components to generate geothermal energy from the ground. These pipes are filled with fluid which transports the energy from the ground to the heating pump or the cooling unit. In order to place these pipes into the components, their manufacturing process has to be adapted. This manufacturing processes is described in this thesis. The manufacturing process of the components bears risks of damaging the already existing pipes. Damage has to be avoided because defect of one pipe leads in most cases to failure of the entire circulation. This thesis describes frequent cases of damage and methods to avoid them. Furthermore, the obligatory quality test is explained, which helps to detect damage of the pipes. In conclusion, buildings and structures, which are using geothermal energy, are described. They should demonstrate that these systems can be easily integrated in the construction process without any exceptional financial or technical efforts.