In the construction industry there are different methods to manufacture a building. An effective method is to produce a modular building. In the making of modular houses, the module is built in a factory along with the building elements. Fixed furnishing and appliances are also completed in the factory. Modules are being used to reduce the building time on the construction site and reduce the risk of injuries. Revit is a BIM-software that is used in the making of three-dimensional digital models, quantities, and two-dimensional drawings. Parts of the work process in Revit can be streamlined if the software is used in the right way. When designing modules in Revit there are no distinct processes to work with, which can lead to delays during the design stage. In this work tests have been done to find a distinct way of working with design of modules in the basic design stage, modules with wooden joists and mirrored modules with wooden joists. The results of the tests show that it varies when the different methods should be used. To unique modular houses, where the modules do not need to be reused in other projects, it is most effective to use groups. When the modules need to be reused in other projects it is more effective to create the modules by working with links.