How the points are modeled
Estimated point impact based on publicly available GRESB guidance. Results are illustrative and do not represent official GRESB scoring. The 2026 GRESB Real Estate Assessment includes a 70-point Performance Component. Within Performance, the Building Certifications aspect has a maximum score of 10.5 points, with BC1.1 (up to 7 points) and BC1.2 (up to 8.5 points) plus BC2 Energy Ratings (2 points). The final BC1.2 score is added to the BC1.1 score to generate an overall BC1 score, which has a maximum of 8.5 points. BC1.2 is relative-scored and based on certified floor area, not asset count. Actual scoring is influenced by factors such as validation status, ownership, and certification age. Each CSP delivers full points in BC1.2. IREM’s estimated BC1.2 range maps coverage tiers (under 25%, 25–50%, 50–75%, 75%+) to typical point outcomes observed across GRESB submissions. Entering an average floor area can refine the estimate. For portfolio-specific scoring, consult a GRESB AP.
How the fees are calculated
Per IREM’s published rate card: a $99 registration fee applies to every property. Single-property application fees are $1,195 (member or AMO) and $1,705 (non-member). Volume program rates of $1,020 (member or AMO) and $1,450 (non-member) apply to companies committing to 10+ certifications with an active ESG reporting practice (GRESB, GRI, CDP, or S&P CSA). Volume program also includes CSP credits for portfolio-level initiatives not modeled here.
Disclaimer
GRESB® is a registered trademark of GRESB B.V. This calculator is provided by IREM as a planning aid and is not affiliated with, endorsed by, or sponsored by GRESB B.V. For portfolio-specific scoring, consult a GRESB AP.
How the comparison is benchmarked
The “Other certifications” figure reflects the dominant property type in your mix. Per-type estimates are drawn from published 2024–2025 program fees for comparable whole-building operational certification programs, for a mid-size existing building (roughly 50,000–100,000 sq ft). Estimates range from ~$3,500 (industrial) to ~$4,800 (healthcare) per building. Where no comparable program offers a dedicated track for the dominant type (e.g., senior housing, self storage), the calculator uses the nearest equivalent and flags the gap. The IREM CSP is the only operational certification that covers all seven property types under a single program structure. All comparison figures exclude assessor, consultant, commissioning, and energy-modeling fees. None of the benchmarked programs offer a volume discount structure comparable to IREM’s.