Yes, if it's blight/graffiti on private property then the building owners are responsible for removing it. This will end up being referred to code enforcement. The building owners may have it cleaned off, but it will return unless they take added measures like installing security cameras and even then.

City of Oakland Public Works Agency referred this issue to CODE ENFORCEMENT, service request # 474766. 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.

Place is worse than before. This business should be fined.

Some improvement but still plenty of graffity. Need to clean immediately.

No progress. Same graffiti