The International Living Future Institute (ILFI) has announced the newest version of the Living Building Challenge, widely considered the built environment’s most rigorous performance standard.

The 2.1 version of the Challenge is a minor modification of the 2.0 standard and does not represent any significant changes to the program, mostly containing updates on program support and team resources. The most significant new development is the new optional preliminary audit. This option allows project teams to receive a conditional review after construction is complete of many of the program’s imperatives in advance of the official audit, which takes place after a minimum of 12 months of operation.

More than 140 projects have registered around the world since the Challenge was first released as a certification program in 2006. The world’s first fully certified Living Buildings are now built and fully operational, proving that this extremely high level of performance is now possible, says Jason F. McLennan, ILFI CEO and creator of the standard.

“The standard will continue to adapt and evolve over the ensuring years with the participation of our growing community of practitioners,” he adds.

For more information on the Living Building Challenge or to read version 2.1 in its entirety, click here.