Mikaela Kieffer
2 minute read

View our quarterly LEED rating system and reference guide addenda for April 2019.

The April 2019 quarterly LEED rating system and reference guide addenda is now available.

To view the changes:


Three new LEED Interpretations (10487–10489) were published, and four existing LEED Interpretations (2700, 10102, 10129 and 10470) were updated.

LEED Interpretations 10487 and 10488 apply to LEED v4.1 BD+C and ID+C projects that are regulated by ASHRAE Standard 90.1–2013 or IECC 2015. These interpretations provide an alternative when documenting the LEED v4.1 Energy and Atmosphere (EA) prerequisite Minimum Energy Performance and the LEED v4.1 EA credit Optimize Energy Performance.

LEED Interpretation 10489 provides an exemption for projects with smaller ventilation systems to comply with the particulate matter filtration requirements under the LEED v4 EQ prerequisite Minimum Indoor Air Quality Performance.


Rating system corrections were published for the LEED v4.1 Building Design and Construction, Interior Design and Construction and Operations and Maintenance rating systems.

Reference guide corrections were published for the LEED v4 Building Design and Construction, Operations and Maintenance and Homes Design and Construction rating systems.

To see all corrections, download the reference guide tables.

New pilot credits


Indoor Water Use Reduction was updated 3/26/2019.

Other updates to note

The LEED credit library has been updated to include new features within the innovation catalog and the pilot credit library for LEED v4.1 BD+C, ID+C and Residential.

LEED v4.1 education

To help answer your LEED v4.1 questions, we’re hosting a series of live, online "Ask the Experts" sessions, where you will be able to connect directly with USGBC and GBCI subject matter experts and ask questions.

LEED v4.1 Ask the Experts: Energy and Water

LEED v4.1 Ask the Experts: Materials and Indoor Environmental Quality

LEED v4.1 Ask the Experts: Location and Sites

Visit the LEED addenda database