California law requires all apiaries to register with their local Agricultural Commissioner's office. 

Apiary registrations are being processed through the Bee Where program: https://beewhere.calagpermits.org 

Starting in January 2020, San Mateo County will be collecting a $10 registration fee for Apiary Registrations with 10 or more hives.  Currently (in 2019) we are not collecting registration fees.