The Changeling was produced by a Canadian production company and filmed in Canada, with establishing shots filmed in Seattle, and some location shooting was done in New York City. Notable Seattle locations seen in the film include SeaTac airport, University of Washington's Red Square, the Space Needle, the Rainier Tower, and the Lacey V. Murrow Memorial Bridge, amongst others. The interior scenes at the university were filmed at the University of Toronto and the Historical Society scenes at the Flatiron-shaped Hotel Europe in Vancouver. The scenes at the senator's home were filmed at what was then Royal Roads Military College (now Royal Roads University) in Victoria, British Columbia. Interior scenes of the mansion where Scott's character lives were a set, as were the exterior scenes; the house was a giant mock-up.