The article presents an analysis of the application of Building Information Modelling (BIM) and accompanying standards in the protection and upgrades of historic buildings on the example of the adaptation and modernisation design of the Lilpop, Rau and Loewenstein factory in Warsaw. It outlines the way in which conservation-specific studies have been successfully incorporated into a project prepared in accordance with the requirements of the BIM methodology, and discusses issues of unmet objectives and organisational and technical problems encountered. Key findings highlight the limitations of the current BIM methodology and the implementation of the Industry Foundation Classes (IFC) standard in the Autodesk Revit environment in terms of accurately representing the state of preservation of historic buildings, as well as the inability to fully integrate the prepared research materials into the BIM model. Therefore, there is a need to develop an advanced information model tailored to the needs of architectural heritage projects and areas for improvement are indicated in the current IFC-based data organisation. The development of such a model is key to supporting the preservation and regeneration of historic buildings. It facilitates access to historical, artistic and scientific data, leading to more effective heritage assessments and recommendations. The proposed approach aims to optimise decision-making and collaboration between architects, heritage conservationists and BIM experts in the management and protection of historic structures. In addition, the text discusses the particular challenges encountered during the project implementation, such as maintaining naming conventions, typologies and element breakdowns, and integrating the research materials into the BIM model.