Assessment Correction

The Assessment Correction is a post-submission service carried out during the preliminary results Review Period and designed to strengthen the reliability of our Assessments and Benchmark Results. The service can be requested from September 1 to September 15 (23:59 UTC) i.e. after the release of the Preliminary Benchmark Reports. The service is used in cases where a participant realizes there was an error in the data input, allowing them to correct the input, leading to better data quality.

1. Review your Preliminary Benchmark Report and reach out to [email protected] for any questions you may have on points missed or reasons behind specific validation decisions. The GRESB Member Success Team will work together with participants during the Review Period to answer questions, prior to using the Assessment Correction Service. This is to ensure that the participant understands the process and the scope of the service.
2. If an Assessment Correction is the best way forward for the participant (based on the need to correct responses or evidence), you will be provided with a Typeform survey.
3. The Typeform must be completed and submitted by the participant between September 1 and September 15 (23:59 UTC)
4. Once the form is submitted to GRESB, the Member Success Team will de-submit the Assessment (within 1 business day), allowing the users of the entity to edit their Assessment.
5. The Assessment must be resubmitted within 3 business days of GRESB de-submitting (note that the last re-submissions should be made no later than September 17th, 23:59 UTC).
6. Once re-submitted, GRESB will re-validate, re-score, and re-benchmark your Assessment. Based on the scope of the changes to the Assessment, GRESB will inform participants of the validation decisions prior to the release of the final Benchmark Report.
7. All changes made during the Assessment Correction process will be reflected in the final Benchmark Report, which will be released on October 1st.

The price of the service depends on the type of data edited. You can find the list of manually validated indicators/elements of each Assessment in 2025 here.

* GRESB incurs re-validation costs for new information that is subject to manual validation. Any change that requires manual validation will be subjected to this fee. This includes the “Other” answers and open-text boxes which are subjected to manual validation. 

• Example of non-manually validated indicators/elements
  Adding missing building certification (Real Estate) or data coverage value for EN1 (Infrastructure Asset) that was missed out in the original submission.
• Example of manually validated indicators/elements
  Adding a new document as evidence for PO1 Policy on environmental issues

Submitting a form for an Assessment Correction means GRESB has permission to invoice the entity using the bill-to-party information provided in the form.

1. Participants can use the Assessment Correction service to amend indicator responses such as checkbox selections and hyperlinks, add additional documentation, or correct performance data that was inadvertently left out in the original submission.
2. Participants cannot use the Assessment Correction service to supplement their submission with data that was collected after the GRESB submission deadline (i.e., July 1).  For example, if additional energy data (or any performance data) relevant to the submission was made available to the participant any time after July 1, this data cannot be added to the submission. This is to ensure that the GRESB dataset is based universally on what is available as of July 1.

When participants contact GRESB at [email protected] to ask why an indicator was Partially Accepted or Not Accepted, the Member Success Team will explain the reasoning behind the validation decision and help participants understand the validation criteria

• If a participant believes something in their documentation was overlooked, this will become clear during the discussion.

In the rare case that a validation error has occurred, GRESB will correct the decision (no fee will apply) and clarify to the participant.

• If no error occurred, but the participant wants to improve their submission, they can use the Assessment Correction service to add additional documentation or adjust their submission to better align with their existing evidence. The Assessment Correction fee will apply. The Member Success Team will guide participants on what specific changes are needed to improve the validation outcome.

During the Review Period in September, participants can review their preliminary results and correct any errors using the Assessment Correction service. Final results will be published on October 1 incorporating these corrections. As a result, your GRESB Score, GRESB Rating, and/or various rankings may change — even if you have not participated in the Assessment Correction.

The GRESB Score combines both relative and static scoring. Relative scoring is based on performance compared to the benchmark value. If the benchmark value shifts due to corrections made by other participants, then the scores may shift.

The GRESB Rating is based on a global quintile distribution: only the top 20% of entities receive a 5-star rating. If one entity’s rating increases due to corrections, another’s will decrease to maintain the distribution.

For more information on the Assessments, validation requirements of indicators and scoring, please refer below to the Standards and Reference Guides and Scoring Documents.

• 2025 Real Estate Standard and Reference Guide and Scoring Document
• 2025 Infrastructure Asset Standard and Reference Guide and Scoring Document
• 2025 Infrastructure Fund Standard and Reference Guide and Scoring Document
• 2025 Infrastructure Development Asset Standard and Reference Guide and Scoring Document