The core activity of Iltis Bau encompasses three main areas: 1. **Landscape Gardening**: Planning, development and implementation of garden spaces, including the creation of relaxation oases. 2. **Civil Engineering**: Execution of works such as excavation, drainage systems, connections and disconnections to house connections as well as other civil engineering works. 3. **Paving**: Laying of stones and paving for paths, seating areas, barbecue areas and other garden and outdoor spaces.