Extended reality (XR) technologies, encompassing virtual reality (VR), augmented reality (AR) and mixed reality (MR), have emerged as powerful visualisation mediums for enhancing the architectural design-fabrication process. AR has the practical relevance of streamlining on-site construction workflows by reducing errors, while its theoretical significance lies in its ability to transform traditional design and fabrication methodologies. AR can facilitate communications between humans, humans and robots during fabrication processes. In this paper, we examine three innovative case studies on the integration and utilisation of AR technology in architectural design-to-fabrication processes of collaborative tasks such as assembly and co-creation. First case study, uses AR overlays to facilitate human–human collaboration in implicit fabrication. Second case study explores the role of AR in supporting human–robot collaboration (HRC) for non-deterministic design processes. Third case study demonstrates how AR can enhance human–robot collaboration (HRC) in remote settings. By investigating these case studies, we provide insights into applied applications of AR in architectural contexts and the technology’s potential to support collaboration in architectural design-fabrication settings.