The key innovation of INSITER is the intuitive and cost-effective Augmented Reality (AR) for self-inspection. The use of AR –that connects virtual and physical buildings in their environments at real-time– will ensure that the targeted performance in the design model is realised. INSITER will thus eliminate the gaps in quality and energy-performance between design and realisation of energy-efficient buildings made of prefabricated components. The new concept of self-inspection that is performed simultaneously with on-site processes has a strong contrast with the traditional post-inspection approach. INSITER will develop a new methodology for self-inspection during construction, refurbishment, maintenance and commissioning, along with a dedicated toolset. INSITER will substantially enhance the functionalities and capabilities of measurement and diagnostic instruments (like portable 3D laser scanners, thermal imaging cameras, acoustic and vibration detectors, real-time sensors) by means of a smart Application Programming Interface (API) and data integration with a cloud-based Building Information Model (BIM). The triangulation of Geospatial Information, Global and Indoor Positioning Systems (GIS, GPS, IPS) will support accurate and comprehensive Virtual and Augmented Reality (VR and AR).