New London Plan – Whole Life Carbon Guidance


The New London Plan and its Whole Life Carbon Guidance has come into effect. Below we’ve provided guidance on how eTool can be used to produce the information needed for the WLC Assessment at different project stages.

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Project Construction Stages

Pre-Application Stage

Applicants are required to confirm various details about the site and to provide details of the WLC principles which are informing the development of the site. 

eTool can be used to calculate carbon emissions associated with pre-construction demolition (kgCO2e).

  • If estimates are not possible, please apply standard assumption of 50kgCO2e/m2 of the existing building/s

Outline & Detailed Planning Stage

This stage of the process requires a baseline WLC assessment against each life-cycle module to be undertaken.

Improvement strategies should also be modelled at this stage and compared against the baseline model. The potential carbon reduction information is needed in the submission template.

Submission template information:

  • Software tool used: eTool 
  • Type of EPDs and carbon database used: Latest eTool Life Cycle Inventory source – eTool Default LCI v19 (2023)
  • Explanation of the third-party mechanisms which have been adopted to quality assure this submission: Third Party Verification conducted by Cerclos Coaching team.
  • Use eTool to calculate carbon emissions associated with pre-construction demolition (kgCO2e). If estimates are not possible, please apply standard assumption of 50kgCO2e/m2 of the existing building/s
  • Use eTool Scenarios feature to calculate whole life-cycle carbon reduction of key improvement strategies and further potential opportunities, and report on kg CO2e / m2 GIA
  • eTool’s ‘Excel Report – GLA’ will provide the following output:
    • Material type and quantity (kg) in each category
      • Total material quantity takes into account the construction and transportation waste factors as well.
    • Maintenance, repair and replacement assumptions (module B)
    • Material end of life scenarios (module C)
    • Estimated reusable materials (kg) and estimated recycled materials (kg) (module D)
    • Refrigerant annual leakage rate (%) and end of life recovery rate (%) to be filled manually by study author
    • GWP for all life cycle modules, split per building element category:
      • Sequestered or biogenic carbon reported separately (kgCO2e negative value)

Post-Construction Stage

Update of the information provided at planning submission stage and for the actual WLC carbon emission figures to be reported using actual material quantities and site emissions during construction. Information should be submitted to:

List of product specific EPDs for products that have been installed: Product name and EPD reference number. You can get the list of EPDs that have been added to your Design via the EPD Tab.

Same format of information produced during detailed planning stage can be generated for the post-construction result using the As-Built model from eTool, and the GLA Excel report.

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Generating the GLA Excel Report in eTool

To facilitate GLA reporting for our users, we have prepared an automated excel report in eTool to help our users.

Below are the steps to ensure that your GLA Excel Report is generated correctly from eTool:

  1. Ensure “Global Warming Potential Biogenic, GWP B” indicator is enabled at the Project Level in eTool (only available in LCI source v17 and higher).
  2. Complete modelling your LCA in eTool & get the Design certified.
  3. After certification has been completed. Navigate to the ‘Reports’ tab in your Design and generate the ‘Excel Report – GLA’ report.
  4. Save the file onto your computer.
  5. Open the excel file. You may encounter the following error message however click on ‘Yes’ to proceed and the file will open normally.
  6. You may need to click on ‘Enable Editing’ to enable you to fill out the rest of the missing details in the spreadsheet.

Please note that we have recently introduced two new Categorisation Standards: RICS WLCA 2E and ICMS3. This will affect the results of the GLA Excel report using these new categorisations. The report is currently being revised. Stay tuned for further updates.

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How to Pull Out Material Quantity Information by Weight (Mass)

To pull out the kg material data from eTool, first ensure that you have turned on the ‘Mass of Materials, total’ indicator in the Project level.

Next, use the ‘Analysis’ tab as per the steps in the image below.

Note that if you’re using the v17 Default LCI source, when using the ‘Analysis’ tab, there is a bug for steel mass quantities. The quantity for steel needs to be divided by 5 and multiplied by 100 (XX / 5 * 100) for the correct tonne of steel quantity. This issue does not occur for the v18 and higher Default dataset.

There is an option to generate the Materials Inventory Summary Report, however the number in the report doesn’t include “construction waste” & “lost in transport” factors. Thus, there are some slight variance from the figures in the Analysis Tool.

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SAP 10 Grid

Please note that the UK 2020 SAP 10 Grid is available in the eTool Default dataset.

You will see a warning that the grid does not align with EN 15978 standards due to the environmental discount factors applied to adjust potential future impacts. The relevant quality check will be left in question to highlight this deviation from EN 15978.

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Relevant Articles:

Sequestered Carbon

Hotspot Analysis Tool in eTool








  1. Yoyo4155


    I have got a project that is targeting the New London Plan – Whole Lifecycle Carbon Assessment. However, I don’t have access to the LCI source – v17 in my account. Please can you help with this?

    Best regards,

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