Disclaimer: GRESB Infrastructure Development Asset Assessment Scoring Document
The GRESB Infrastructure Development Asset Assessment Scoring Document accompanies the GRESB Infrastructure Development Asset Standard and Reference Guide and is published as a standalone document. The Scoring Document reflects the opinions of GRESB and not of our members. The information in the Scoring Document has been provided in good faith and is provided on an “as is” basis. We take reasonable care to check the accuracy and completeness of the Scoring Document prior to its publication. While we do not anticipate major changes, we reserve the right to make modifications to the Scoring Document. We will publicly announce any such modifications. The Scoring Document is not provided as the basis for any professional advice or for transactional use. GRESB and its advisors, consultants and sub‑contractors shall not be responsible or liable for any advice given to third parties, any investment decisions or trading or any other actions taken by you or by third parties based on information contained in the Scoring Document. Except where stated otherwise, GRESB is the exclusive owner of all intellectual property rights in all the information contained in the Scoring Document.
Purpose of this document
The GRESB Infrastructure Asset Scoring Document provides a comprehensive explanation of how individual indicators are scored within the Infrastructure Asset Assessment. It is designed to complement the Reference Guide, which outlines the specific reporting requirements for each indicator. Together, these documents help participants understand the assessment criteria, meet reporting requirements, and interpret their scores effectively.
For additional guidance on understanding the Benchmark Report insights, refer to the “How to Read Your Benchmark Report” document. Frequently asked scoring-related questions are also addressed in the FAQ document.
GRESB Scoring Model
Scoring within the GRESB Infrastructure Development Asset Assessment is fully automated and completed without manual intervention. The maximum score for the Infrastructure Development Asset Assessment is 100 points, all of which come from a single Development Component (module).
GRESB Rating
The GRESB Rating is an overall relative measure of ESG management and performance of the asset.
The calculation of the GRESB Rating is based on the GRESB Score and its quintile position relative to the GRESB universe, with annual calibration of the model. If the participant is placed in the top quintile, it will have a GRESB 5‑star rating; if it ranks in the bottom quintile, it will have a GRESB 1‑star rating, and so forth.
Indicator Score Breakdown
Each indicator within the GRESB Infrastructure Development Asset Assessment is assigned a specific scoring weight. The maximum score an entity can achieve for each indicator depends on several factors, with the scoring process incorporating scoring weights and scoring multipliers. For details on materiality-based scoring, please refer to this section below.
Simple Scoring Weights
The options and sub-options of most scored indicators* have different scoring weights. These weights, displayed in red on the left side of each indicator, represent the distribution of total available points per indicator according to the priorities established by the GRESB Foundation, aligning with market trends and sustainability best practices.
When indicators have options and sub-options, the scoring weight for each sub-option is first summed, and the resulting value is multiplied by the main fraction assigned to that option. The final score is the cumulative sum of these weighted sub-options across all main options within the indicator, multiplied by the indicator's maximum points.
If the sum of sub-option weights surpasses one, the value is capped at one. If the sum of the options surpasses the indicator's maximum score, the value will be capped at that maximum.
The score for these indicators is determined as follows:
Indicator Score = [(Sum of sub-option scoring weights) * (Selection weight)] × (Maximum score for the indicator)
Example: Indicator LE3 – ESG, climate-related and/or Human Capital and/or Health and Safety senior decision maker (2.44 points).
The indicator consists of three main options: ‘ESG,’ ‘Climate-related risks and opportunities,’ and ‘Human Capital’. ESG, for example, carries a weight of (3/6). Within each main option, there are several sub-options (i.e., Board of directors, C-suite level staff), each assigned its own weight. In the case of LE3, each sub-option contributes a scoring weight of 1. If an entity chooses one elements under ‘ESG,’ one element under ‘Climate-related risks and opportunities,’ and one element under ‘Human Capital’, the calculation would read as:
*Not applicable to indicators HS1-3, which instead involve performance table scoring. See the ‘Performance Tables’ section for clarification on how GRESB scores these indicators.
Scoring Multipliers
Validation Multiplier
For indicators that are subject to manual validation (see Appendix 4 of the Reference Guide), the evidence’s validation status acts as a multiplier to determine the indicator’s final score.
If supporting evidence for indicators is fully accepted, it results in the application of the full multiplier (100%) to the indicator's score. If supporting evidence is partially accepted, it results in a reduced multiplier (50%). If the evidence is not accepted, the multiplier is set to 0, regardless of the original selection’s predefined scoring weight. Indicators and responses subject to manual validation can be found in Appendix 4 of the Reference Guide.
Validation Multiplier Example
For indicators with a validation multiplier, the final score is calculated using the following formula:
Indicator Score = ((Sum of scoring weights) × (Multiplier)) × (Maximum score for the indicator)
Example: Indicator LE4 - Personnel ESG Performance Targets (4.81 points). Each selected personnel group contributes a specific scoring weight. It is mandatory to upload evidence that supports the entity’s selections. The evidence’s validation status (i.e., accepted, partially accepted or not accepted) is associated with a scoring weight that is used as a multiplier to determine the final score.
If an entity chooses ‘ESG managers’ and ‘Investment analysts’ but its evidence is given a partially accepted validation status (multiplier: 0.5), the calculation would be as follows:
Coverage Multipliers
When applicable, coverage percentage can also be used as a multiplier to determine the assigned score. This multiplier applies to the following indicators as follows:
- Percentage of employees who received training: EM1
- Percentage of contractors who received training: CO1
Coverage Multiplier Example
Example: Indicator Employee engagement (max score determined by materiality). Taking the following scenario:
- The entity provides professional training to 100% of employees, and ESG-specific training to 10% of employees. It has also undertaken an employee survey within the last three years. An independent third party conducted the survey, and it included a Net Promoter Score.
Scoring is then calculated as follows:
-
Does the entity provide training and development?
-
-
The survey is undertaken:
-
- 0.275 + 0.5 = 0.76 * 4.62 (max score) = 3.51 points
Performance Tables
Indicators HS1-3 require participants to input quantitative data into a table. For these indicators, scoring depends on the values input to certain cells. Scored cells are shaded to indicate their scoring impact. For details on which cells are scored and how, please refer to the indicator-specific requirements in this document.
Materiality Factors and ESG Issues
The GRESB Materiality Assessment (indicator RC6), as well as additional information drawn from the Entity & Reporting Characteristics indicators (RC2, RC3, and RC4) determine the relevance of 35 ESG issues across the assessment. Each ESG issue’s relevance level then determines its scoring weight.
An asset’s ESG issue weightings are displayed at the bottom of the indicator in the GRESB Portal.
Materiality |
Weighting |
No relevance |
0 |
Low relevance |
0 |
Medium relevance |
1 |
High relevance |
2 |
Issues of ‘no’ or ‘low’ relevance are deemed non-material and receive no score in the assessment and are effectively removed from consideration. Issues of ‘medium’ and ‘high’ relevance are scored proportionally, with weights of one and two, respectively.
- For example, for entities in the primary sector ‘Renewable power: Solar power generation,’ the issue ‘Air pollution’ is of ‘No relevance’ and does not need to be considered by entities in this sector in the Assessment.
- On the other hand, for entities in the primary sector ‘Power generation x-Renewables: Independent Power Producers: Gas-Fired Power Generation’, ‘Air pollution’ is of ‘High relevance’ and will have a greater scoring impact across the assessment.
Once each of the ESG issues has been assigned a materiality weighting (relevance), these apply to certain indicators in slightly different ways.
- All indicators: Each indicator is directly tied to an ESG issue or is specifically catered for construction-related activities; as such, the materiality weighting of 0, 1, or 2, applies to its entire maximum score. This means that the weight of each indicator within overall GRESB Score is redistributed proportionately across the entire assessment. GRESB often refers to this concept as ‘dynamic materiality.’
- Note for indicators RM2.1 and RM2.2: Materiality determines these indicators’ maximum scores and sub-option scoring weights. This means that within these indicators, each sub-option (i.e., ‘Child labor’ or ‘Community development’ in PO2) is also associated with a materiality/relevance level of 0, 1 or 2.
Materiality and Scoring Tool
Participants can model an entity’s materiality results and their scoring implications using the Materiality and Scoring Tool. This tool, which models the GRESB Materiality Assessment of indicator RC6, contains the following information:
- Each indicator’s E, S, and G designation
- Each indicator’s maximum score
- Each indicator’s weight in its respective Aspect
- The entity’s maximum score per indictor, once materiality is applied
- Details on how the materiality weightings are assigned based on materiality factor responses
- Sector definitions and sector-specific output metrics
Additional Clarifications
Open text boxes are not used for scoring purposes but are intended for additional reporting or explanatory purposes.