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Supervisor Certificates: Standards and Requirements

Applying for a supervisor certificate is the first step to obtaining a contractor license. Each certificate type must be applied for separately.

Holders of a state electrical or plumbing license can apply directly for a contractor license and do not need a supervisor certificate first. For all other work, license applications will not be accepted until supervisor certificates have been approved.

Use the links below to review what work is allowed under each certificate type, the minimum experience required in order to apply for the certificate, and whether passing an ICC exam is required. Specialty Class D certificates do not require an exam.


Demolition / Moving

Electrical (includes Access Control and Electrical Signal)

Fire Protection


Specialty Class D

  • Specialty Class D includes Signs and all other trades, e.g., Roofing, Green Roofs, Tenant Finish, Drywall, Insulation, Framing, Antennas, etc.


The online certificate application will require you to upload notarized letters of experience that document how you meet the minimum experience needed for that certificate type. These letters must come from owners or officers of current or previous employers, or clients that have hired you to do work. If you are the owner of the company, you must go to previous employers or clients that you have done work for as you can not be your own reference.

Notarized letters should be in the following format:

  • Original notarized letters. These can be scanned and uploaded if applying online.
  • If a company is verifying your experience, the letter should be typed on company stationary.
  • List exact duties, projects performed and equipment operated.
  • List exact start and end dates (month and year) of construction work only for each project. Projects should have been completed within the last ten (10) years. Use the following format:  
    Start Date:  MM/YY, End Date:  MM/YY.
  • List the address for each project mentioned. 
  • Include letters from previous or present employers or customers who have hired you to do the type of work covered by that certificate. 
  • Do not submit letters from other officers / members of your company, subcontractors, or family members.
  • Submit as many notarized letters as needed to document the minimum experience requirements for the certificate you are applying for.
  • Retain copies of your application and notarized letters. The Contractor Licensing office will not be able to make additional copies for you.

Colorado Revised Statutes require that applicants submit an Affidavit of Lawful Presence and Secure and Verifiable Identification as proof that they are lawfully present in the United States. 

Complete the Affidavit of Lawful Presence (PDF) and upload it with your certificate application.

  • Alternatively, mailed certificate applications must have the Affidavit of Lawful Presence and a Secure and Verifiable Identification notarized.
  • If you are submitting your application in person to the Contractor Licensing office, you may fill out the Affidavit in the presence of Contractor Licensing staff and present an original form of identification.
  • If you are submitting an application for another person, you must have the Affidavit of Lawful Presence and a Secure and Verifiable Identification notarized.

Once your application is submitted online, it will take approximately 7 to 10 business days to be reviewed. You will receive an approval or denial email once the application has been reviewed, and will then be able to return to the online application to pay for the certificate.

Mail-in applications can take up to 14 business days to be processed. Do not submit payment with your application. You will be notified by telephone of application approval or rejection. (Please note that the Contractor License office can only give application status to the actual applicant.)

In the event that your application is not approved, you will be given the opportunity to apply a second time. Additional documentation is required. 

However, if the application is not approved the second time, there is a six-month waiting period before applicants can re-apply for the same certificate type.

For Specialty D Certificates:

If your application is approved, you will have 90 days to procure your certificate by paying the appropriate fee amount. Specialty D certificates are valid for 3 years.

  • Please return to your online certificate application to pay fees.

For Certificate Requiring ICC Testing:

If your application is approved, you will have 90 days to procure your certificate by submitting the official ICC pass letter and your payment.

Approved supervisor certificate holders may now apply online for a contractor's license.


Apply for a certificate online

Tutorial: If needed, download a PowerPoint tutorial for help setting up an online account or completing the certificate application online.