In the present paper, the authors present a new approach that merges in a Building Information Modelling (BIM) environment geospatial data obtained by a set of non-destructive technologies, namely terrestrial laser scanning, ground penetrating radar, and unmanned aerial systems, as well as the results of the classification of the observed anomalies. This approach was applied to the inspection and characterization of the main façade of the Monastery of Santa Maria da Vitória in Leiria, Portugal, also known by Monastery of Batalha, which is inscribed on the UNESCO World Heritage List. Its main styles are Gothic and Manueline, a Portuguese late gothic. By applying this approach to the monastery, the spatial data required to produce a high-fidelity 3D model was obtained. Ground-penetrating radar (GPR) was employed to assist in the characterization of the internal structure of the walls and piers and to spot different building materials, which is helpful for the investigation of some of the detected pathologies. The data acquisition technologies were also analysed with emphasis being given to their most relevant limitations and to strategies for optimization of the surveys.