Street and Sidewalk Code - Chapter 12.15 prohibits the posting of political signs on public property. Public property includes lampposts, public trees, telephone poles, and on any public property such as parks, street medians, and public sidewalk median "planting strips". If the street does not have sidewalks the first 10 feet is public property. The campaign sign must be on private property or behind the sidewalk or back 10 feet.
Contact Code Enforcement: Inspection Services Division (626) 744-4633
Or complaints can be filed on line @ http://ww2.cityofpasadena.net/planning/deptorg/insp/onlineform.htm