From 2026, GRESB scores embodied carbon in the Development Component: up to 5 points (3 for measurement, 2 for disclosure) for uploading upfront A1–A5 carbon with credible evidence. GRESB projects an average Development Benchmark impact of about −5.3 points, so the question for developers is no longer whether to measure embodied carbon, but whether the evidence is audit-ready.
What changed in GRESB 2026
For the 2026 Real Estate Assessment, GRESB turned embodied carbon in the Development Component from a data-collection question into a scored indicator. Up to 5 points are now available for new-construction projects: 3 points for measurement (based on the share of projects with measured upfront carbon) and 2 points for disclosure (validated manually against uploaded evidence). Points require upfront carbon (life-cycle stages A1–A5) results supported by credible evidence.
This is the most material scoring change in the 2026 update. GRESB's own methodology projects a Development Benchmark impact ranging from −8 to 0 points, with an average of about −5.3 points for affected participants. Standing still is therefore a score decline, not a neutral position.
Why it matters for developers and CRE operators
Embodied carbon — the emissions locked into materials and construction before a building opens — is now a benchmarked line item, not a voluntary disclosure. Two consequences follow:
- Evidence quality, not intent, is scored. The disclosure points are validated manually, so an unsupported number scores nothing. Measurement must trace to a recognised life-cycle assessment covering A1–A5.
- The bar rises again in 2027. GRESB has approved a shift from portfolio-level to asset-level reporting of upfront carbon emissions from 2027 onward, so 2026 is the year to build the per-asset data pipeline rather than a portfolio estimate.
How to be ready
- Scope A1–A5 upfront carbon per project, not a portfolio average, so the 2027 asset-level transition is a continuation rather than a rebuild.
- Attach credible evidence — a life-cycle assessment or verified EPD-based calculation — to every project claiming points; the disclosure points depend on it.
- Baseline early. A measured baseline this cycle protects against the projected average decline and creates the audit trail future cycles will require.
Frequently asked questions
How many points is embodied carbon worth in GRESB 2026?
Up to 5 points in the Development Component: 3 points for measurement (share of projects with measured upfront carbon) and 2 points for disclosure (validated manually against uploaded evidence covering life-cycle stages A1–A5).
How much could GRESB 2026 lower a developer's score?
GRESB projects a Development Benchmark impact between −8 and 0 points, with an average of about −5.3 points for affected participants — the largest single scoring change in the 2026 update. The figure is GRESB's projection, not a guaranteed outcome for any one portfolio.
What changes for embodied carbon reporting in 2027?
GRESB has approved a shift from portfolio-level to asset-level reporting of upfront carbon emissions from 2027 onward, so per-asset A1–A5 measurement built in 2026 carries forward.
Sources: GRESB 2026 Real Estate Standard updates and DMA2 (Embodied Carbon Measurement & Disclosure) guidance at gresb.com; GRESB 2026 Standard Methodology Insights; sigearth.com GRESB 2026 analysis. Projected score impacts are GRESB's own projections — verify current point values and thresholds at gresb.com before submission.
Research compiled by the AISB agent fleet from primary sources; every claim verified against the public record. Cost figures are labeled industry estimates. Full source list available on request — hello@ai-smart-buildings.com.