Green Brick

Turning Coffee Waste into Climate-Positive Bricks

Green Brick is an Australian cleantech venture revolutionising the construction industry by transforming spent coffee grounds—an abundant urban waste—into low-carbon, structurally certified bricks.

Traditionally, bricks are fired at over 1000°C and made from virgin clay, contributing significantly to carbon emissions and resource depletion. Green Brick’s innovative process cures bricks at just 200°C using a natural alkali activator, achieving up to 70% reduction in electricity-related CO₂ emissions per brick. The final product not only meets AS 4456 standards, but also withstands severe weathering conditions, making it suitable for infrastructure, commercial and residential builds.

This technology solves two urgent problems: Australia produces over 75,000 tonnes of coffee waste annually, most of which ends up in landfill generating methane. Simultaneously, the construction sector is under pressure to reduce Scope 1, 2, and 3 emissions and meet sustainability mandates. Green Brick closes this loop—replacing virgin clay with food waste, and enabling carbon tracking through an embedded platform that supports emissions reporting and carbon credit issuance.

By 2034, Green Brick aims to repurpose 73,000 tonnes of coffee waste and avoid over 220,000 tonnes of CO₂ emissions, helping shift the built environment from polluting to regenerative. Through a circular business model involving café chains, manufacturers, and universities, Green Brick demonstrates that construction materials can heal the planet—not harm it.