First stop: http://www.creia.org
California DOES NOT license home inspectors. Be careful how you choose.
1. Does the inspector have a background in construction?
2. Does he/she have E & O insurance? Verify it.
3. The latest Calif RPA requires your inspector to have general liability insurance.
4. When will you receive the inspection report?
5. Is there a sample report on his/her web site.