Maintenance is a central task for ensuring the permanent functionality of buildings and the documentation of maintenance work is an essential aspect of quality assurance. In parking garages, there are often several thousand damaged areas, which are traditionally documented by hand in paper plans. However, this is error-prone and impractical, especially since parking garages frequently change owners, with the paper plans (partly) regularly being lost. Within the research project "DigiPark", a digital process was developed based on Building Information Modeling (BIM) to optimize the documentation and management of damage in buildings, using parking garages as an example. In the first step, the process involves creating a digital twin, i.e., capturing the physical building in a digital 3D model as a basis for documenting damage. For this, methods for capturing geometric-semantic properties of buildings were investigated and a concept for an efficient implementation was developed. In the second step, a user-friendly mobile system for the semi-automatic georeferenced documentation of damaged areas was realized which is capable of estimating its position and orientation (pose) in real- time in buildings without external infrastructure. This was solved by incorporating a visual-inertial Simultaneous Localization and Mapping (VI-SLAM) approach. Finally, an interface for integrating the captured damage in the BIM model was implemented based on the Industry Foundation Classes (IFC)-conforming standard BIM Collaboration Format (BCF). The result enables an efficient BIM- based management of damage to optimize tasks such as planning of maintenance work.