We create 3D BIM models using Graphisoft Archicad and Autodesk Revit,which enable efficient design and provide a collaborative platform for all projectproject participants. We choose LOD (Level of Detail) according to the client's needsBetween 100 and 400. The sectional designs are built in separate models, which are combined into one main model.The building is thus constructed at the design stage, allowing visual and non-visualinformation is available for all forms of construction. The virtual building3D model of the building can be used to detect errors in traditional 2D drawings. The most typicalproblem is the layout of mechanical and electrical systems in the building.In close cooperation with the designers, all steps of the building process can bein a multiphase collision analysis, the conflicting elements are identified and aa collision-free model. This allows the model to be analysed before construction starts.necessary repairs before construction starts, which will save significant cost and time during subsequent constructionfor the Client. The models are not only used to assist in the design process, but also toThere are many other uses for models, such as Scan to BIM, implementation models orwe can even help with the implementation.