In this video, we describe how we used open source information modelling, also called openBIM, on a building project, Building 310, at the Technical University of Denmark, DTU. We worked with the entire value chain from the design phase through delivery of the building, thus with the client, the architect, and the engineers. OpenBIM enabled us to quality assure the material in collaboration, fast and efficiently, and was essential in order for us to deliver the building to the client on time, on budget, and on scope with no defects or deficiencies.