How much rent do you increase?

[Peter Sik]

I have a property in area of Gandolf Court, Murrieta, California 92563, current rent is $2095.  Just received a renewal inspection report from PM. The property inside out is in clean and neat condition with nothing needs for repair. The tenant is paying rent on time. So, I am very happy with this tenant over all.  

According to Zillow, it is under rent for $500 and for Realtor it is under rent for $200.  Want to hear your advise on how much the rent should be increase for such a good tenant. Thanks in advance.