The International Living Future Institute (ILFI) is a non-profit organization based in Seattle, Washington that is dedicated to promoting sustainable building practices and communities. The organization was founded in 2006 and is best known for its Living Building Challenge, a certification program for buildings that meet strict sustainability standards. ILFI also offers other certification programs, including the Zero Energy Certification and the Core Green Building Certification. In addition to certification, ILFI provides education and advocacy for sustainable building practices, and hosts conferences and events to promote collaboration and innovation in the field. The organization has a staff of around 50 employees and is governed by a board of directors.