The Fourth IET International Conference on Intelligent Environments was held July 21- 22 at the University of Washington campus in Seattle, Washington. The general chairs were Diane Cook of Washington State University and Sumi Helal of the University of Florida. Hani Hagras and Vic Callaghan of the University of Essex served as program chairs. This article presents a report of the conference. Copyright © 2009, Association for the Advancement of Artificial Intelligence. All rights.