Jansen GmbH Tief- und Rohrleitungsbau primarily constructs and maintains supply lines for gas, water and district heating and provides the necessary pre- and post-earthworks in civil engineering. Approximately 75% of clients are municipal energy utilities from Cologne and the surrounding area. The service offering also includes a limited scope of new and repair work on house connections as well as planning, installation, laying and maintenance of electrical lighting and power systems; the company does not perform research and development. In the 2024 financial year the company employed on average 24 people and holds certifications such as ISO 9001-2015, DVGW GW 301 and AGFW FW 61.
das Verlegen von Rohrleitungen, die Vornahme von Erd- und Tiefbauarbeiten sowie die gewerbsmäßige Arbeitnehmer-Überlassung; ferner die Planung, Errichtung, Verlegung und Wartung von sowie Reparaturen an elektrischen Licht- und Kraftanlagen sowie Verlegung von Elektrokabeln aller Art einschließlich Lieferung sämtlicher elektrotechnischer Erzeugnisse sowie sämtliche artverwandten, dem Gesellschaftszweck dienenden Geschäfte; ferner der Maschinen- und Anlagenbau;
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Source: German Commercial Register (Handelsregister) Köln Local Court, HRB 22184 (as of 27 September 2026)
Source: German Commercial Register (Handelsregister) Köln Local Court, HRB 22184 (as of 27 September 2026)
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Source: German Commercial Register (Handelsregister) Köln Local Court, HRB 22184 (as of 27 September 2026)
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