To participate on any CDB project as a subcontractor, supplier or in any capacity you must have a CDB REGISTRATION #.

If you are currently or have ever been prequalified with CDB your firm has been assigned a registration number.

To inquire about an existing registration # send an email to:
 
    CDB.SubContractReg@illinois.gov

To apply for a new # use the attached link which will take you to registration form.