The main goal discussed in this article is the creation of tools for the implementation of calculation tasks at the design stage. The proposed method helps to significantly reduce labor, time and money costs both at the design stage and in the subsequent construction of the building. To implement the task, two approaches were used in parametric modeling using two different tools in BIM modeling. With the help of Revit and ArchiCAD, as well as their extensions Dynamo and Grasshopper, solutions

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... re created to speed up the calculations required in the process of implementing projects of varying complexity. The results obtained revealed the main differences in the implementation of one task in two different software packages. Moreover, each of the obtained solutions is flexible and can be used in other projects. Also, these solutions can be upgraded to implement calculations of other characteristics of design solutions in the project. Thus, the task was implemented and applied in the Revit and ArchiCAD project.