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Sources for The Office Building That Had to Prove It

Published Jul 15, 2026

Sources Used

  1. Bullitt Center

    International Living Future Institute / primary certification / case study

    Building size, Seattle location, office use, net-positive energy operation, and educational mission.

    Accessed 2026-07-21

  2. Living Proof: The Bullitt Center Case Study

    University of Washington Center for Integrated Design / 2013 / technical case study

    Owner mission, Living Building Challenge performance basis, water-energy-materials criteria, integrated design process, net-zero energy target, and role of the solar roof.

    Accessed 2026-07-21

  3. The Bullitt Center achieves full Living Building Challenge Petal Certification!

    Bullitt Foundation / 2015-06-26 / primary / interested-party

    Certification date, first office-building claim, annual energy performance, material screening, FSC wood, composting toilets, and rainwater capture.

    Accessed 2026-07-21

Image Sources

  1. Bullitt Center, Seattle, Washington, photographed January 25, 2014.

    Joe Mabel / 2014-01-25 / CC BY-SA 3.0

    Permission contact: https://commons.wikimedia.org/wiki/User:Jmabel

    Original file: https://upload.wikimedia.org/wikipedia/commons/5/54/Seattle_-_Bullitt_Center_03.jpg