I am trying to locate the address of the owner of a property, 1610 Via La Plaza, San Marcos, CA 92078.

So are you trying to find the owner of the property? Or are you just trying to find this location?

I moved out recently and need to take the landlady to small claims court to sue her for returning my deposit. I now realize she has been very cagey using a PO Box, etc. I need to try and find her address to have her served. Her name is Christina Russell and I know she lives in Laguna Beach, but that's all.