Carbon Due Diligence Office Complex in Hamburg
An office building put to the test: What energy-efficient measures can be implemented quickly—without a full-scale renovation—without disrupting day-to-day operations or inconveniencing tenants? At an office complex in Hamburg, the sustainability experts at LIST Eco sought—and found—answers.
The five-building complex was constructed in 1955 and has since been expanded, renovated, and refurbished several times. Using carbon due diligence, LIST Eco analyzed the current energy performance of the existing building. This clearly identified areas for optimization and the corresponding measures.
Identification of five structural optimization measures:
An overview of the sustainability concept:
- Identification of five structural and three building services measures
- First, reduce the building’s energy demand (upgrading the building envelope)
- Increasing savings in building services through an energy management system
- CRREM 1.2: Optimized variant delays stranding by 11 years
- In the long term, design generation and transmission systems to be economically sustainable
- Realistic cost estimates make renovation activities plannable and transparent
Postponement of the stranding point by 11 years (CRREM 1.2):
Manage to Green:
The greatest potential for improvement lies in the building envelope. Rock wool insulation and double-pane windows—if the exterior walls are re-insulated and the property’s windows are replaced as suggested, this results in a CO2 reduction of approximately 31 percent. If all construction-related potential is fully realized, emissions will even drop by up to 46 percent.
