Procedural techniques are used to generate 3D models, textures, images, and effects. Procedural modelling is widely used in areas such as architecture, archeology, and video games, and is based on a series of rules and algorithms. Computer-generated architecture (CGA) is a set of rules that software uses to automatically generate models. This paper describes the process of creating three models using CGA rules and procedural modelling. The models were created using the free Blender software and the geometry nodes system, which allows the user to procedurally modify geometry based on nodes. The process of modelling parts of the building, the materials, and the process of creating the procedural rules according to which the building models are generated are described in detail. An example of the building model was created, as well as two models based on real objects, the Westin hotel in Zagreb and the Mimara museum. In the end, the possibilities that procedural modelling provides in geodesy are described, such as spatial planning, simulation, facility management,