Renew Business License to operate in the City of Diamond Bar, California online using this service.
Diamond Bar (CA) Business licenses are valid for one year and must be renewed annually. Any person who fails to renew their license on or before the renewal date shall be deemed to be operating without a license, and will be subject to delinquent fees that double each thirty-day period.
Renewal fees are $14 for basic licenses. Additional fees may apply for those applications requiring substantial changes and/or background check.