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NECO2 - National Embodied Carbon Repository

NECO2 – New Zealand’s national embodied carbon data repository – supports the construction sector to make informed decisions that reduce the carbon impact of buildings.

✔️ Access NECO2 data repository

Developed by CIL Masterspec using 12 years of BRANZ-verified carbon data, NECO2 provides free public access to embodied carbon data on thousands of New Zealand construction materials.

When paired with tools such as BRANZ’s LCAQuick environmental assessment product, NECO2 enables architects, designers and engineers to compare the carbon footprints of materials and make smarter environmental choices early in the design process.

NECO2 is endorsed by Ministry of Business, Innovation and Employment (MBIE), and backed by Registered Master Builders and the New Zealand Institute of Architect as shareholders of CIL Masterspec.

NECO2 replaces BRANZ’s CO2NSTRUCT tool.

Updated: 22 September 2025