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Shape a livable future and place nature, the environment and people at the center.
Our key milestones in company development
1994 Founding of PNL - Planungsgruppe für Natur und Landschaft GbR (Planning Group for Nature and Landscape GbR) by Frank Bernshausen and partners; First office located in the former Trais‑Horloff train station
1999 Hiring of the first employee
2000 Relocation to the former Hungen grammar school
2000 New TNL office opened in Lich
2001 First major project
2011 Establishment of a branch office in Weiden, Upper Palatinate
2014 Relocation to the new company premises at Hungen train station
2016 Foundation of TNL Energie GmbH
2021 Acquisition of PGL - Planungsgruppe Landespflege TNL GmbH (Planning Group Landespflege TNL GmbH) in Hanover
2021 Foundation of TNL Buttenheim GmbH
2024 TNL receives TOP100 Innovator award
2024 TNL celebrates its 30th anniversary
2025 TNL successfully defends its title and is again named TOP100 Innovator
2026 TNL's Lich office relocates to Beethovenstraße in Hungen
2026 DBAG aquires a majority stake and becomes strategic partner of TNL
2026 TNL Buttenheim GmbH and Planungsgruppe Landespflege TNL GmbH are merged into TNL Energie GmbH
Our company philosophy
We at TNL see the concept of sustainability as far more than an empty phrase. Based on the understanding that a humane and dignified human existence can only be sustained if stable natural conditions are preserved, our business objectives must align with high ecological and social standards.
Humans transform their environment, shaping and structuring it according to their needs. We accompany these transformations and enable them to be designed sustainably through innovative planning approaches.
In terms of the quality standards applied to the projects we carry out with you, our clients, TNL Umwelt consistently achieves above‑average results. Projects are handled by specialized teams whose members possess many years of planning experience. Through regular participation in in-house and external seminars and training programs, we can guarantee a high level of professional expertise.
By continuously acquiring new knowledge and maintaining close communication — both within the company and with our business partners — we create the foundation needed to successfully represent our clients in all of our projects.
This enables us to achieve the following goals for you:
- Adaptive execution: Environmental planning processes are rarely set in stone from the outset. Even in advanced planning stages, changes may arise that require adaptation. With more than 30 years of experience, handling situations such as these has become routine for us.
- Balanced results: Technical, legal, and engineering aspects of planning services are coordinated and integrated optimally for your benefit.
- Cost‑efficient outcomes: We do not engage in unnecessarily expensive, ineffective high‑end optimization.
- Communicated results: Implementing projects that are not in tune with the interests of affected communities is a difficult task in todays world. It cannot be denied that balancing different stakeholder interests can be challenging. But this is a goal we can accomplish!
- Swift execution: Through continuous knowledge updates, a large team of employees, and an extensive professional network, we can achieve a focused and therefore efficient processing of your assignments.


