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Johann Kontor Hamburg – DGNB Platin

Client

AUG. PRIEN Immobilien, Project Development Ltd.

Project period

2016 – 2024

Results

DGNB Platinum for office, hotel and underground parking
Sustainability embedded from competition through to operation
Future-ready district with high-quality use and amenities

Johann Kontor on Klosterwall is a contemporary reinterpretation of a classic Kontorhaus in the heart of Hamburg. The mixed-use complex—comprising residential, office, hotel, and retail spaces—replaces the former City-Höfe development and strengthens the district in terms of urban design, functionality, and energy performance. Intep has supported the project holistically since 2016, from defining the sustainability strategy for the competition through to DGNB Platinum certification and the transition into operation.

The starting point

The City-Höfe complex from the 1950s shaped the site on Klosterwall for decades, but it no longer met today’s functional or energy performance requirements. In the sensitive context of the Kontorhaus District, the task was to create a future-ready urban quarter that combines a diverse mix of uses with high urban design quality and ambitious sustainability standards.

As part of the design competition, the project team decided at an early stage to integrate sustainability systematically into the development process and to pursue an ambitious DGNB certification. Against this backdrop, intep was commissioned to provide long-term support for the project’s sustainability processes.

Our contribution

Intep supported Johann Kontor as a strategic sustainability partner across all relevant project phases. As early as the competition stage, we embedded specific sustainability criteria and carried out an LCA-based scenario comparison between refurbishment and new-build options. During design and construction, we managed the DGNB certification process for the office and residential components, led the DGNB audit, coordinated the evidence and documentation, and guided the project through to successful conformity assessment—achieving DGNB Platinum certification for the office and hotel uses.

In doing so, we systematically embedded the key DGNB quality sections—environmental, economic, sociocultural and functional, technical, and process quality—throughout planning and execution up to commissioning, while deliberately integrating sociocultural aspects into both the design and delivery process. Social-use elements such as a daycare centre and cultural offerings were also considered as part of the holistic sustainability approach, in line with the sociocultural quality criteria.

Finally, intep supported the transition into operation, including the tendering of property management (PM) and facility management (FM) services. The result is an economically viable, environmentally sound, and functionally future-ready urban quarter with exemplary character.

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