Crafts and services in the construction and real estate sector, in particular plastering work, shutter delivery and installation, renovation and conversion work, in particular planning and completion from a single source, total renovations of building technology systems, especially kitchen and bathroom, as well as all related and subordinate activities. May establish branches and subsidiaries at home and abroad, participate in other companies, acquire or sell other companies, as well as acquire, encumber, manage and sell real estate and securities.