The owners of the building projects perceive primarily their graphic part. This current situation should be commented with reference to the equally important part of the documentation, which is the construction budget of the contractor. For more complex projects, SW equipment for budgeting is required and include a complex database of price items of various types. This database is not commercially divided for single-sided focused small construction companies. Acquiring and maintaining such programs is an unnecessary financial burden for them. For single-sided focused construction activities, it is possible to separate the required items and apply them for automatic budget generation. The paper focuses on the realization of thermal insulation with the creation of lists for material, salaries for workers, machines.