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Plumbing Contractors

Registration Services

Plumbing Contractors 


  • Original Registration:  You are applying for an original registration in Colorado.
  • Renew:  You currently hold a Colorado registration and are in a renewal period.
  • Reinstate:  Your Colorado registration has expired and you wish to reinstate the registration. 


Registration Requirements

  • Click here for registration requirements for Colorado Plumbing Contractors. 

NOTICE: Apprentice Registration is Online ONLY

Beginning on November 1, 2013, hard copy, mail-in apprentice registration applications will no longer be available.  Contractors will be directed to use our online registration system to register apprentices when hired or remove their registration upon separation. You can find instructions for using the online system here.

NOTE: Our new system requires that all contractors have a correct FEIN (Tax ID number) in our database. If an attempt to register results in a “No match found” error message, please DO NOT register a new account, contact us at DORA_DPO_OnlineLicenses@state.co.us or 303-894-2421 so that we may ensure information accuracy in our system.


Applications & Forms

Application for Original Registration

Application to Reinstate an Expired Registration

Acknowledgment of Responsibility Form

Application for Company Name Change



Registration Expiration Grace Period for New Applicants. All new applicants who are issued a plumbing contractor registration within 120 days of the upcoming expiration date will be issued a registration with the subsequent expiration date.

Registration Renewal Information. All Plumbing Contractor registrations expire on February 28 in odd-numbered years and must be renewed to continue practicing.



Still have questions?

Please review our list of Frequently Asked Questions for quick answers and email information.


Stay Informed!

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1560 Broadway, Suite 1350, Denver, CO 80202 Email
(303) 894-7800 - Phone (303) 894-7693 - Fax