Carbon-Standards

From Building Materials to Climate Action – The Global Construction C-Sink Standard

Every building can now be more than infrastructure – it can be a verified Carbon Sink

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By using bio-based construction materials such as wood, hemp, straw, and biochar, today’s buildings can become powerful carbon sinks (C-sinks). By storing carbon, in building materials, millions – potentially billions – of tons of CO₂e, could be locked away. It is carbon that has been removed from the atmosphere by plants and that does shape now sustainable cities and infrastructures.

The first building to be validated and verified – by OPENLY

Why Global Construction C-Sink matters

The high-quality construction of carbon sinks meet the rigorous standards expected by today’s carbon removal (CDR) market. They can be traded and, thus, monetized, and become an integrative part of business models in construction, real estate, and finance.

Immediate impact – Carbon is stored from day one.
Scalable – Biomass is available in sufficient volumes to meet global market demand.
Traceable – Every C-sink is precisely located and verifiable within the building.
Long-term carbon storage – Storage is maintained over the lifetime of a construction, and often well beyond.

The Global Construction C-Sink Standard

The Global Construction C-Sink Standard verifies buildings and civil engineering works that embed bio-based materials. Each verified project becomes a C-Sink Unit and can be registered in the Global C-Sink Registry, provided all emissions from material production and transportation are fully offset.

This ensures that every verified construction delivers verifiable, long-term biogenic carbon storage, and market-ready climate benefits.

Explore the Global Construction C-Sink Standard