This paper focuses on experiences concerning a project aiming at visualisation of threedimensional (3D) property units in Stockholm, Sweden. The Swedish national registrationsystem, the national real property register, includes a textual description as well as a twodimensional map, normally consisting of a scan of the legal map document produced duringthe property formation process. Today, a 3D-pdf or a BIM model cannot be part of the formalproperty formation decision and documentation. It can thus be difficult to illustrate 3D realproperty on just a two-dimensional map.The paper describes a project carried out by Stockholm municipality to visualise 3D propertyunit volumes within the municipality by combining them with existing 3D city models(including building- and terrain models). The aim is to show and analyse the problems andchallenges identified in the project by illustrating what has been done and how the use of 3Dreal property information can be further developed in the future.The method used in this research is a document study of the project focusing onrepresentation in the digital cadastral index map for 3D real property units as part of thenational real property register, as well as associated documentation from other agencies, andby interviewing key persons involved in the project.The project created a local 3D model which is stored in the municipality´s own internaldatabase. Some information was retrieved from the national real property register, such asinformation on height (lowest and highest) and the horizontal expansion of the real property.Data was then processed and analysed using Feature Manipulation Engine (FME) to create 3Dproperty volumes. The project used in-house software and data as much as possible. Thevolumes were stored in the municipal database.The 3D volumes could be used as a supplement to the information stored in the national realproperty register and the cadastral dossiers. The results can be used as a component for thedevelopment of a national three-dimensional cadastral index map as well as for enabling 3Dmodels as part of the formal cadastral property formation procedure.