IREM CSP: GRESB points pathway
GRESB points pathway
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Building certifications account for up to 17.5% of the GRESB Score. The IREM® CSP is how you cover the rest of the portfolio.

Building certifications account for up to 8.5 points in GRESB’s BC1.2 Operational Building Certifications indicator, the largest single building-certification line item in the 2026 Real Estate Assessment. The IREM® Certified Sustainable Property (CSP) helps GRESB participants close portfolio coverage gaps with an operational certification that supports real, 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

Model your portfolio. Model the lift.

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.

Inputs Adjust to your portfolio
Portfolio size (total assets) 40
10150300+
CSP certifications this cycle 25
1255075100125150
Average floor area per building optional sq ft
If your portfolio has uneven building sizes, entering an average refines the BC1.2 estimate (which scores on floor-area share, not asset count). Leave blank to use a typical mid-size assumption.
IREM membership status
Property mix (% of certified assets) 100%
Multifamily
40%
Office
25%
Industrial
15%
Retail
10%
Healthcare
5%
Senior housing
3%
Self storage
2%
Estimated lift & investment Illustrative
Portfolio coverage from this CSP cycle
33.8 % of your portfolio
Each CSP delivers full validation-tier credit within GRESB’s BC1.2 indicator (worth up to 8.5 points).
Asset-count coverage 33.8% certified
Estimated BC1.2 contribution
2–6 of 8.5 points
Range reflects peer-group benchmarking. Portfolios with above-median floor-area coverage typically earn the upper end; below-median earn the lower end. Ask your GRESB AP for portfolio-specific scoring.
Certification investment Volume rate applies
Registration $99 × 25 properties
$2,475
Application $1,020 × 25 properties
$25,500
Total · USD $27,975
Saves $4,375 vs. single-property member rate
How this compares
Other certifications (average) ~$3,833 × 25 properties
$95,825
Saves $67,850 vs. the average of comparable whole-building operational certifications
Assumptions. Based on published 2024 to 2025 multifamily certification fees from comparable whole-building operational programs (~$4,200 per building for a mid-size existing property, roughly 50,000 to 100,000 sq ft). Figures exclude assessor, consultant, and energy-modeling fees, which are typically required by the other programs and would widen the gap.

Why this certification, why now.

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 deadline
November 1, 2026. New certifications guaranteed within the year submitted
Questions
sustainability@irem.org · (800) 837-0706
How the points are modeled GRESB’s 2026 Real Estate Assessment allocates up to 8.5 points under BC1.2 (Operational Building Certifications) within a 70-point Performance Component, plus 7 points under BC1.1 and 2 under BC2 (17.5 building-certification points total). BC1.2 is scored on aggregated floor-area coverage by validation tier, on a curve relative to peer-group performance — not on asset count. Each CSP delivers full validation-tier credit. The estimated BC1.2 range shown maps coverage tiers (under 25%, 25–50%, 50–75%, 75%+) to typical point outcomes observed across GRESB submissions. Entering an average floor area per building narrows the range modestly. Actual scoring depends on peer-group placement, property-type weighting, and certification age. 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.
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.