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Building certifications can contribute up to 10.5 points in GRESB, with as many as 8.5 points available in BC1 alone. BC1.2, Operational Building Certifications, is the largest single building certification indicator in the 2026 Real Estate Assessment. IREM® Certified Sustainable Property (CSP) helps participants close portfolio coverage gaps with an operational certification that supports measurable, day-to-day sustainability performance.
8.5
BC1.2 maximum 2026 RE Assessment
7
Property types all eligible
10+
Volume program threshold
Nov 1
2026 priority deadline
Set your portfolio size, the number of assets you plan to certify this cycle, and your property mix. The calculator returns an illustrative BC1.2 points estimate plus the full cost of CSP registration and application fees. Nothing here guarantees a GRESB score. Read the methodology notes below.
For companies submitting to GRESB between April 1 and July 1, the math is simple. Each additional certified asset improves BC1.2 coverage. A single volume enrollment for 10 or more certifications offers discounted fees and review timelines as short as two weeks after application submission. The IREM CSP Volume Program is free for qualifying portfolios. Companies that enroll before summer have a clear path to the November 1 priority deadline and the 2026 GRESB reporting cycle that follows.
Enroll in the volume program
See program eligibility
Priority deadlineNovember 1, 2026. Application review guaranteed within the year submitted.
Questionssustainability@irem.org | (800) 837-0706
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.
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.
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.
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.
2026 GRESB Real Estate Assessment2026 GRESB Real Estate Assessment, Indicator BC1.2GRESB Real Estate Standard 2026 UpdatesIREM CSP program page
The BC1.2 points estimate in this calculator is illustrative, not diagnostic. Actual GRESB scoring depends on peer-group performance, certification validation tier (full, partial plus, partial minus), property-type weighting, and certification age.
IREM is an ENERGY STAR® partner. Data tracked in Portfolio Manager® can be shared directly with an IREM account for a CSP application.
The CSP program is supported by a Yardi Energy Efficiency Grant.