# LEED v4.1 BD+C | MR credit Building Life-Cycle Impact Reduction (Option 2) | Europe ACP

**URL:** <https://community.oneclicklca.com/t/leed-v4-1-bd-c-mr-credit-building-life-cycle-impact-reduction-option-2-europe-acp/1497>\
**Category:** LEED\
**Tags:** lca, standards\
**Created:** [August 7, 2024, 2:46pm UTC](https://community.oneclicklca.com/t/leed-v4-1-bd-c-mr-credit-building-life-cycle-impact-reduction-option-2-europe-acp/1497 "2024-08-07T14:46:01Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![jcmduarte](https://avatars.discourse-cdn.com/v4/letter/j/9e8a1a/32.png) [@jcmduarte](https://community.oneclicklca.com/u/jcmduarte)\
**Post date:** [August 7, 2024, 2:46pm UTC](https://community.oneclicklca.com/t/leed-v4-1-bd-c-mr-credit-building-life-cycle-impact-reduction-option-2-europe-acp/1497/1 "2024-08-07T14:46:01Z")

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Hello,

I am performing a Whole-Building Life-Cycle Assessment for a hotel building in Portugal according to the LEED v4.1 BD+C MR credit Building Life-cycle Impact Reduction (Option 2) requirements.

The LEED online reference guide states in the credit language section that “_For European projects, EN standard 15978 may be used as a framework for the Life-Cycle-Assessment. Where the implementation of EN 15978 conflicts with any requirements of this credit, the credit requirements prevail, including the life-cycle stages required and treatment of EPD data._”.

Since EN 15804:2012+A2:2019 no longer complies with ISO 21930:2017, such EPDs cannot be used in Building LCA calculations that follow EN 15804:2012+A1:2013 requirements for their results (adapted from [EN 15804+A2: What the changes mean for EPDs | One Click LCA](https://oneclicklca.com/en/resources/articles/en-15804-changes-epds)).

Therefore, the One Click LCA’s tool “LEED Int’l (CML)” does not use EN 15804:2012+A2:2019 compliant EPDs.

Is this assessment correct?

Thanks in advance for your help.

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**Author:** ![Steven](https://dub1.discourse-cdn.com/flex013/user_avatar/community.oneclicklca.com/steven/32/4_2.png) [@Steven](https://community.oneclicklca.com/u/Steven)\
**Post date:** [August 8, 2024, 7:32am UTC](https://community.oneclicklca.com/t/leed-v4-1-bd-c-mr-credit-building-life-cycle-impact-reduction-option-2-europe-acp/1497/2 "2024-08-08T07:32:54Z")

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Hi João!

For LEED v4.1 you should indeed use +A1 data (for projects outside of North America) however they do offer a path in which you can follow the Level(s) methodology **([Building Life-Cycle Impact Reduction | U.S. Green Building Council](https://www.usgbc.org/credits/new-construction-core-and-shell-schools-new-construction-retail-new-construction-data-27))**

Under this method, you could use the Level(s) LCA tool (which uses EN15804+A2 data) to undertake an assessment.

 ![image](https://europe1.discourse-cdn.com/flex013/uploads/oneclicklca/original/1X/96a82477e1a4403d194828859d7753168ec93b8d.png)

All new EPDs on the EU market have to be +A2 compliant which means undertaking the paths using +A1 data will become a bigger challenge.

**[The v5 draft is already available](https://www.usgbc.org/credits?Version=%22v5+-+Public+Comment+1%22&Rating+System=%22New+Construction%22)** and even though it still aligns with CML results, I assume a similar setup to the ‘Europe ACP’ will be available as otherwise undertaking LEED assessments outside of North America using +A2 data will be nearly impossible. We will have to wait until the new version of LEED v5 is ready before we truly know in which direction they will go.