The present thesis provides a basic insight into the topic of the low-energy construction method. In this regard, key terms are defined as well as current standards and frameworks explained. Furthermore, it deals mainly with the technical design of the low-energy construction. In addition to basic technical facts, possible variants of execution and the resulting advantages and disadvantages are presented. Finally the main objective of this thesis is an economic analysis of a single-family house, which is equipped with additional alternative systems for the extraction of heat energy. For this purpose, the third chapter of this thesis processes the relevant data of the different variants and finally contrasts the outcomes in an economic comparison. Ultimately, the work should provide an insight into the connections of the additional investment costs and the resulting ongoing cost savings of the low-energy construction method.