Sustainability Report
Certificates
Embodied carbon
Key strategies to reduce the building's carbon footprint include:
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Material Reuse: Existing lighting, carpentry, stone, and sanitary equipment were salvaged and reused, preserving historical elements and minimizing embodied carbon associated with new material production and transport.
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Energy-Efficient Heating: Installation of 70 Delta radiators, 140 fan convectors, and underfloor heating enhances energy efficiency and allows future integration with district heating networks, potentially utilizing waste incineration residual heat to minimize operational carbon emissions.
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High-Performance Glazing: New glazing improves thermal insulation, reducing heat loss and overall energy consumption, contributing to lower operational carbon emissions.
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Renewable Energy Readiness: While currently gas-heated, the building is prepared for future connection to district heating, enabling the adoption of renewable energy sources like waste incineration residual heat, and supporting long-term sustainability goals.
Operational Emissions / Energy
The 2018–2022 renovation of Antwerp City Hall strategically reduced operational carbon emissions while preserving its heritage. Key improvements include:
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Improved Building Envelope: High-performance glazing and enhanced thermal insulation reduce heat loss and overall heating/cooling demand, balancing energy efficiency with heritage conservation.
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Intelligent Building Automation: Smart control systems dynamically adjust heating, lighting, and ventilation based on occupancy and external conditions, minimizing unnecessary energy consumption.
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Natural Ventilation: Integration or retention of natural ventilation in select areas minimizes HVAC load.
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Adaptive Reuse & Flexible Space Planning: A multi-purpose, flexible layout avoids underutilized conditioned spaces, while zoning allows for selective heating/cooling.
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Daylight Optimization: LED lighting significantly reduces energy consumption, complemented by interior layouts that maximize natural daylight.
These improvements support Antwerp's commitment to a low-carbon future, aligning with its goals of reducing greenhouse gas emissions by at least 40% by 2030 and aiming for a 50-55% reduction in CO2 emissions compared to 2005 levels by 2030, ultimately striving for carbon neutrality by 2050.
Afterlife
Antwerp City Hall's renovation thoughtfully integrates adaptive reuse and design-for-disassembly, aligning with long-term sustainability goals like circularity and flexibility. The renovated spaces, including the ground floor public area, event-ready basement, and the Verlicht Verdiep (Illuminated Floor), feature multi-functional floor plans, readily adaptable for exhibitions, offices, civic functions, or public events. Respecting the historic building's spatial logic, the design creates open, reconfigurable interiors, enabling future repurposing without major structural changes. Contemporary artwork and installations are integrated for easy adaptation or rotation, minimizing permanent architectural alterations.
Antwerp City Hall is promoting sustainability and a circular economy by encouraging citizens to reuse, repair, and recycle materials. Design initiatives include:
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Dismountable building components:
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Interior walls, ceiling panels, and lighting systems were installed using dry construction techniques (e.g., mechanical fastenings instead of adhesives), allowing them to be easily removed and reused or recycled.
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The raised floor systems and modular partitions also support easy adaptation or relocation.
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Sourcing of sustainable materials:
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Materials like Terrabloc raw earth bricks and Kalzip aluminium cladding were selected for their recyclability and low embodied carbon.
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Use of prefabricated and modular systems, such as the greenhouse-style steel structure in certain areas, further enables disassembly and reuse at end-of-life.
Key products in low carbon design
