On 22 April 2026, the International Organization for Standardization (ISO) published ISO/TR 37115—1:2026, the first international technical report on zero-carbon cities, developed under Chinese leadership. This standard directly impacts green building materials manufacturers, exporters, and sustainability certification service providers — particularly those targeting EU, Singaporean, and Middle Eastern markets where environmental product declarations (EPD), Green Mark, and Estidama certifications are mandatory or increasingly influential.

Event Overview

On 22 April 2026, ISO officially released ISO/TR 37115—1:2026, titled Cities and Communities — Sustainable Development — Zero-Carbon Cities — Part 1: Case Studies. The document was led by China and is designated as a Technical Report (TR), not a full International Standard (IS). It provides practical implementation pathways for zero-carbon urban development, with specific guidance on life-cycle carbon management of green building materials, integration of renewable energy, and interface specifications for intelligent energy systems.

Which Subsectors Are Affected

Green building materials exporters and trade-focused enterprises
These entities face evolving regulatory expectations in key export markets. As ISO/TR 37115—1:2026 establishes foundational interoperability references for carbon accounting and system integration, it may inform future revisions of EPD requirements (EU), Green Mark scoring criteria (Singapore), and Estidama Pearl Rating System thresholds (UAE). Impact manifests in increased documentation demands, potential recalibration of product-level carbon footprints, and tighter alignment between material data and city-scale decarbonisation frameworks.

Building materials manufacturers (especially cement, steel, insulation, and prefabricated component producers)
Manufacturers must now consider how their product-level environmental data — especially cradle-to-gate and cradle-to-site carbon metrics — aligns with the system-level interfaces described in the TR. While the TR does not impose direct compliance obligations, its adoption by national standardisation bodies or certification schemes could trigger downstream data requests from developers, specifiers, or importers seeking alignment with zero-carbon city planning protocols.

Sustainability verification and certification service providers
Third-party verifiers and EPD programme operators may need to assess whether their current verification scopes and reporting templates accommodate the lifecycle carbon management principles and interoperability logic outlined in ISO/TR 37115—1:2026. Its inclusion of smart energy system interface specifications suggests growing demand for cross-domain verification competence — bridging material science, energy modelling, and digital infrastructure standards.

What Enterprises and Practitioners Should Focus On Now

Monitor official adoption signals from target markets

Track whether the European Committee for Standardization (CEN), Singapore’s BCA (now BCA Academy under BCA), or UAE’s Abu Dhabi Urban Planning Council issue formal references to ISO/TR 37115—1:2026 in policy updates, tender requirements, or certification scheme revisions. A reference in national annexes or voluntary guidelines would indicate early-stage institutional uptake — distinct from binding regulation but highly indicative of direction.

Review carbon data readiness for priority export categories

Focus on products commonly specified in zero-carbon pilot districts (e.g., low-carbon concrete, structural timber, high-efficiency glazing, modular façade systems). Assess whether existing Environmental Product Declarations (EPDs) cover scope 2 and scope 3 upstream emissions sufficiently, and whether energy system interface data (e.g., grid interaction profiles, thermal response parameters) are documented — even if not yet required.

Distinguish between TR status and future standardisation pathways

Recognise that ISO/TR 37115—1:2026 is a Technical Report — intended to collate case studies and support consensus-building — not a certifiable standard. Its influence will accrue gradually through citation, harmonisation with regional frameworks, or evolution into a future ISO/IEC standard. Avoid treating it as an immediate compliance trigger; instead, treat it as a signal of emerging interoperability expectations.

Engage early with domestic standardisation and certification partners

Collaborate with China’s SAC (Standardisation Administration of China) accredited EPD programme operators and green building evaluation institutions to understand how domestic interpretation of the TR may shape supporting guidelines, training modules, or data template recommendations — particularly for firms preparing for overseas market entry.

Editorial Observation / Industry Perspective

From an industry perspective, ISO/TR 37115—1:2026 is best understood not as an enforcement instrument, but as a strategic coordination tool. Analysis shows it reflects China’s effort to anchor global zero-carbon city discourse around actionable, system-integrated methodologies — rather than isolated product metrics. Observation suggests its greatest near-term value lies in clarifying *how* building material carbon data connects to broader urban energy and infrastructure planning — a linkage previously fragmented across disciplines. Current more relevant interpretation is that it serves as a ‘reference architecture’ for interoperability, not a compliance checklist. Industry needs sustained attention because its principles are likely to be selectively embedded into next-generation procurement policies and rating tools — especially in cities piloting integrated digital twins and climate-resilient infrastructure.

Conclusion
ISO/TR 37115—1:2026 marks a procedural milestone in global urban decarbonisation standardisation — one that elevates the role of green building materials within city-scale energy and carbon systems. Its significance is structural, not prescriptive: it offers a shared conceptual framework, not binding rules. For industry stakeholders, it is more accurately viewed as an early signal of converging expectations across certification regimes — requiring proactive data governance and cross-functional alignment, rather than reactive compliance measures.

Information Sources
Primary source: International Organization for Standardization (ISO), publication notice for ISO/TR 37115—1:2026, issued 22 April 2026.
Note: Ongoing observation is required regarding national adoptions, referencing in regional certification schemes (e.g., EPD Programme rules, Green Mark Technical Manuals, Estidama Pearl Rating System updates), and any subsequent work items proposed under ISO/TC 268 (Sustainable Cities and Communities).