Parcel data for California summary and download here. http://egis3.lacounty.gov/dataportal/2015/09/11/california-statewide-parcel-boundaries/
The data are not complete. But downloadable in geodatabase format.
"A geodatabase with parcel boundaries for 51 (out of 58) counties in the State of California. The original target was to collect data for the close of the 2013 fiscal year. As the collection progressed, it became clear that holding to that time standard was not practical. Out of expediency, the date requirement was relaxed, and the currently available dataset was collected for a majority of the counties. Most of these were distributed with minimal metadata."