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Precast Concrete Blocks That Help You Build 
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Precast Concrete Blocks Designed to Build Efficiently and Sustainably

At Envirocon, we lead the way in sustainable construction through our commitment to the circular economy. Instead of letting quality materials go to waste, we take high quality surplus concrete and transform it into durable, reusable precast concrete blocks. As a result, we have created New Zealand’s most sustainable construction system.

As the country’s first and only accredited construction product stewardship scheme, we design products with ultra low embodied carbon that can be reused, recycled, or repurposed at the end of their life. Moreover, our buyback guarantee ensures our blocks stay in circulation, reducing waste, conserving resources, and keeping concrete out of landfill.

Our key products Interbloc and Stonebloc are durable, reusable precast concrete blocks used for retaining walls, storage, and infrastructure. In this way, Envirocon redefines construction by turning waste into long lasting, sustainable building solutions.

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Circular economy infographic showing the life cycle of precast concrete blocks including low carbon manufacturing, sustainable construction use, deconstruction, reuse, and block buyback.
Precast concrete bricks for retaining walls: Submission-ready engineering design in minutes with automated calculations for fast, NZBC-compliant design.

SUBMISSION READY ENGINEERING DESIGN IN MINUTES

Automated calculations for fast, NZBC-compliant design
The design and submission process for retaining walls can be complex and time-consuming. But what if there was a tool that could simplify it all?
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