FYI: If this private property, you should contact Code Enforcement at (510) 238-3381. That dept. will (eventually) notify the property owner who then has 3 weeks to take care of the complaint. This is what City of Oakland does to handle the issue of graffiti abatement on private property.

City of Oakland Public Works Agency referred this issue to CODE ENFORCEMENT, service request # 495782. Please contact that agency to follow-up. For more information, please visit the "Helpful Links to Other Resource Partners" at the link below.
http://www2.oaklandnet.com/Government/o/PWA/Connect/ReportaProblem/index.htm
Thank you.