In 85 days, sustainable design will go through a big change.

On October 31, 2016, LEED 2009 will sunset. All projects registered thereafter will be required to meet the more stringent requirements of LEEDv4.

Ayers Saint Gross has long been a standard bearer for sustainable design. This year, that means investing significant resources in educating ourselves about how LEEDv4 will impact the way we build. Understanding the new standards in this depth allows us to be excited about how certifying projects under this system will advance the caliber of high-performance buildings.

At this point, most people in the AEC industry are familiar with the key differences between LEED 2009 and LEEDv4. Major changes in LEEDv4 include:

  • Energy modeling baseline updated from ASHRAE90.1-2007 to ASHRAE 90.1-2010;
  • Increased scope of fixtures addressed by water efficiency credits, including lab equipment among other process fixtures;
  • Restructured Materials and Resources credits that push for transparency in manufacturing;
  • New metrics in daylighting to more accurately account for daily and annual variations.

But the time for general understanding is winding down. Starting soon, designers will need to know specifics.

You have to get in the weeds about LEEDv4 to have confidence in certifying a building under the new standards and to deliver on a promise to certify a project to a certain level. Later this month, I will address the AIA Austin Summer Conference and dive into the nitty-gritty of what designing under this new rating system will mean, including:

  • Transportation Access. LEEDv4’s public transportation access credit counts the number of trips made by public transit infrastructure, whereas LEED 2009 counted the number of public transit lines. Projects that previously may not have qualified for any public transit points under LEED 2009 may be able to access a point under LEEDv4.
  • Covered Bicycle Parking. Under LEEDv4, both institutional and residential buildings require covered bicycle parking. Under the old system, only residential buildings had to meet this requirement.
  • Regional Materials. LEEDv4 does not offer points especially for sourcing materials from within 500 miles of a project as LEED 2009 did. Sourcing materials locally now allows project teams to double the value of local materials when performing building material optimization calculations.

LEED 2009 is the most widely adopted green building rating system on the planet, and it follows that LEEDv4 is likely to command a similar percentage of market share for green building certifications. However, since LEED 2009 debuted, a number of other rating systems, standards, and codes have been established, including the Living Building Challenge, IgCC, and ASHRAE189.1. LEEDv4 is walking into a much more crowded certification marketplace than LEED 2009 did.

Early and mid-range adopters to the sustainability movement are likely to stay with LEED because it carries significant brand recognition. However, LEEDv4 is progressive enough a standard that later adopters to sustainability may be intimidated to attempt it, especially with a whole suite of other rating systems and standards in the marketplace with lower barriers to entry. As professionals, we will be prepared to serve clients at all levels of sustainability, whether new to the party or well-versed and ready to be on the cutting edge.

We are excited to see how the specifics of LEEDv4 will influence design and sustainability, and believe this and other competitive green building rating systems, standards, and codes will push us all to create more efficient high-performance buildings that serve the community and the world.

See you in Austin!

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