This paper presents the vision behind the McBIM project, funded by the French National Agency of Research (ANR). McBIM stands for "Communicating Matter for BIM" and is a concept coined by the CRAN laboratory, concept at the basis of the scientific contributions of the project. Building upon latest advances in Semantic Web technologies, Wireless Sensor Networks and digital twins in AEC (Architecture, Engineering and Construction), the project aims at delivering real-time integration of sensor data into accurate digital building representations. The overall goal is to enable actionable knowledge, meaning knowledge that supports decision making. After a brief summary of the issues addressed and the overall project vision, this article depicts main contributions made so far in the context of the ANR McBIM project. These address semantic interoperability with BIM standards (e.g. IFC ISO 16739), routing in wireless sensor networks along with autonomic computing.