For construction work below the ground level, a pit must be excavated in advance. With increasing depth of the excavation bottom, the construction of the building pit plays an essential role. A suitable construction method must be selected in the planning phase. It must be clarified in advance which influences are to be considered in a deep excavation. Based on a literature review and on discussions with expert planners, this diploma thesis addresses relevant parameters and boundary conditions in pit construction. Based on this, possible construction methods for the execution of deep excavations are of interest. Possible procedures differ in required steps and performance. They have different ranges of application as well as pros and cons. In the context of this thesis, suitable construction methods are presented after a research of reference books and company documents. This is followed by a classification according to the influencing parameters explained in the first section. Before construction work can start on-site, an appropriate site preparation and equipment must be arranged. Important parameters that need to be considered, are elaborated in the next section of this diploma thesis. Relevant literature, laws and regulations as well as information from specialized companies with practical know-how were used. To get a deeper understanding of the practical aspects, three projects with deep excavations are presented. Based on the corresponding planning documents, it is explained why the construction method was chosen for the respective project. For a specific task, it is important to select a suitable excavation method in the planning phase. For this purpose, the already elaborated influence parameters are used. A procedure for selecting the appropriate method based on these boundary conditions has been developed and is presented in this document. The goal was to define a decision-making process as basis for the planning phase. In the end of the thesis, the previously presented construction projects go through the decision-making process to show which methods can be used or not used in the specific settings.