- 41.20 — Construction of residential and non-residential buildings
- 43.39 — Other building completion
- 71.11 — Activities in the field of architecture
- 71.12 — Activities in the field of engineering, geology and geodesy, provision of technical advice in these areas
- 72.19 — Research and experimental development in other natural sciences and engineering
- 74.90 — Other professional, scientific and technical activities, n.v.d.g.
Construction of buildings