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.