Green building benchmarking hit record participation in 2025. Scores still diverged sharply
Over 2,300 entities completed GRESB's real estate assessment this year, and new entrants scored higher than ever on their first attempt. The remaining question is whether rising floor scores reflect real performance gains or better reporting.
October 2025 · Global
Retrospective analysis of October 2025. Published August 2026.
GRESB released final 2025 Real Estate Benchmark Reports to participants on 1 October 2025, following a preliminary results release and correction window that opened 1 September. The assessment drew 1,002 fund managers submitting 2,382 assessments, a roughly 15 percent increase in total participation over 2024, including 239 entities in an inaugural residential component. New entrants to the benchmark scored an average of 68 in their first year, up 6 points from 2024's first year average, and GRESB reported score increases across the board, which it attributed to stronger management practices and deeper data engagement rather than a change in scoring methodology.
The Signal
GRESB's 2025 Real Estate Benchmark drew 2,382 assessments from 1,002 fund managers, a roughly 15 percent participation increase over 2024, with new entrants averaging a first year score of 68, up 6 points from the prior year's new entrant average.
Why It Matters
A rising first year average score for new entrants is the more informative number here. It suggests the entities newly choosing to participate already have stronger underlying management practices in place, which is different from, and harder to fake than, existing participants' scores improving year over year under the same reporting incentives.
Capital Implication
Investors using GRESB scores as an underwriting input should weight the new entrant data specifically, since it is less exposed to the reporting sophistication effects that can inflate returning participants' year over year gains without a matching change in physical asset performance.
Development Implication
Owners who have not yet participated in GRESB face a rising bar, waiting to enter no longer means competing against a lower historical average, first year entrants in 2025 are already scoring close to what took returning participants several assessment cycles to reach previously.
What We Are Watching
- Whether the 2026 benchmark shows participation growth continuing or plateauing after this year's jump.
- Sector level divergence, healthcare's reported energy efficiency lead over other sectors specifically.
- Whether GRESB or a comparable body moves to separate reporting quality from physical performance more explicitly in future scoring methodology.
- 2025 Real Estate Assessment Results, GRESB
- GRESB 2025 Benchmarks reflect industry maturity and continued progress toward responsible investing, GRESB
