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Obtain a CDB Registration Number? (Subcontractor Registration)
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.
Note: Prequalification and registration are not the same. If you intend to submit a bid for project as a prime contractor, or participant on a single prime project as a designated "protected subcontractor," then you must apply for prequalification approval. Prequalification with the CDB
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
Vendor Registration.