The use of Descriptive Geometry constituted the modus operandi referred to the scientific unit for the development of the representation of multiscale building models relating to the investigation concerning the theme of the recovery of listed and unlisted historic buildings. The procedure used and necessary to implement the comparison useful for digitally reconstructing the artefacts involved the different classes of manuals, treatises and professional practice also inherent to the organization for the descriptions of the techniques essential to the recognisability of the building. With the definition of sine glossa we intend to consider the codified drawing as a regulated practice; that is, without alterations and ambiguities for the purpose of understanding models drawn according to graphic and geometric rules aimed at the recovery of a building organism. At the same time, a specific and qualified observation report was introduced on a part of the architectural, building and engineering heritage considered to be very complex and articulated in both its diachronic and synchronic phases. In fact, the research study exposed in this essay is articulated through the technical aid of the Integrad Project Database, the acronym for BIM, and a comparison with building recovery. These aspects investigate, together with the exercise of redesigning the morphological models of the codified representation, the theme that concerns the housing of the Bolognese villa in the garden city between the years 1920‒1950.