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Traditionally, GPR surveys are performed outdoors to identify buried or embedded objects’ location, orientation, and depth. The objects of interest are commonly linear, planar, or volumetric features of engineering, archeological, geological, or environmental context and significance. Due to constant improvements in component electronics and powerful GPR software developments, GPR hardware and software are finding indoor applications in architecture, engineering, and construction projects of historic and modern buildings and industrial infrastructure. Particularly, insights from indoor GPR surveys can non-invasively identify the embedded object and provide a high-resolution characterisation of the material properties surrounding the object, such that the output is a digital model feeding a Building Information Modelling (BIM) database. We present case studies illustrating how indoor 2D and 3D GPR surveys create digital information for such databases.