| 1983 | Established by Karl-Heinz Janneck as a sole proprietorship. |
| 1990 | Stahlhallen & Baustoffe Janneck GmbH founded. |
| 1996 | Production transferred to Molbergen. |
| Stahlbau Janneck GmbH founded. |
| 1997 | Maschinen- und Kranvermietung GmbH & Co. KG founded. |
| 2002 | Opening of the new production and painting hall in Molbergen. |
| 2007 | Inauguration of the new headquarters in Molbergen, consequently resulting in centralisation there. |
| Stahlbau Janneck GmbH, Maschinen- und Kranvermietung GmbH & Co. KG and Maschinen- und Kranvermietung GmbH are merged into the present Stahlhallen Janneck GmbH. |
| 2014 | Logo re-launch and new website appearance |
