OpenBIM creates interdisciplinary collaboration, knowledge-sharing and transparency between advisors, contractors, and developers. With open file-formats, the project quality is raised and the building price is lowered. A work method which opens up for the use of many BIM-programmes, new opportunities for the user and new services. With specific examples it will be displayed how easy it is to work with e.g. IFC-, BCF-, and PDF-files, from sketching and project planning to execution and the operation.