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Contact Information

  • Online Services – You can find everything about professional licensing here at www.delaware.gov
  • Email – Customer Service email – This email address is being protected from spambots. You need JavaScript enabled to view it.
  • Telephone – (302) 744-4500, Monday – Friday, 8:15 a.m. – 4:15 p.m. We are closed on State Holidays.
  • Mailing Address – Division of Professional Regulation
    • Cannon Building, Suite 203
    • 861 Silver Lake Blvd.
    • Dover, Delaware 19904
    • For state government mail code is SLC Code D420A.
  • Fax – (302) 739-2711. To ensure that your document(s) is routed to the correct department/Board, you may attach this fax cover sheetOpen this document with ReadSpeaker docReader.
  • Complaints – Click HERE to file a complaint. The tile is on the home page. Complaints go directly to DPR’s Investigative Unit.
  • Media Inquiries – Please fill out the Media Inquiries form to request information from DPR.
  • Office Location – Division of Professional Regulation
    • 861 Silver Lake Blvd, Suite 203
    • Dover, DE 19904
    • Latitude/Longitude 39.174393, -75.536107 or View Map

Requirements for an HVACR Conditioning License

  • In addition to submitting the application and fee in DELPROS, you must submit:
    • State/Jurisdiction Licensure Verification sent directly to the Board office from each state or jurisdiction in which you currently hold or have ever held a license.
    • The jurisdiction may be a state, U.S. territory, District of Columbia or any other governmental jurisdiction such as a city or county. In the state of Pennsylvania, HVACR licenses are not issued by a state board. If the only current license you hold was issued by a Pennsylvania municipality or other jurisdiction, you must apply by examination.
    • If a license was for an HVACR business that covered all its employees, instead of your own license as an individual, it is not necessary to obtain a license verification for that business.
      • A copy of your CFC Certification card if you are applying for a Master HVACR, Master HVACR Restricted-Refrigeration, Master HVACR Restricted-Air Conditioning.
      • Proof of your work experience for periods of employment that are required (under Exam and Reciprocity sections below). Arrange for your supervisor(s) to complete the Verification of Employment form.
  • If you cannot obtain the required Verification of Employment form from the supervisor, you may substitute tax form W-2 or an affidavit of the employer or officer of the employing company. You must also enclose a statement explaining why you cannot obtain the Verification of Employment form from the supervisor.
  • To prove your work experience for periods of self-employment, you may submit tax form Schedule C.
  • Acceptance of proof of experience is at the Board’s discretion.

How to Apply for a License?

All applications are submitted through DELPROS. Delaware no longer accepts paper applications.

  • In order to apply for a license or submit a service request, you must first have a DELPROS user account. To LOG IN or CREATE a DELPROS (Delaware Professional Regulation Online Services) user account:
    • Go to: https://delpros.delaware.gov/OH_HomePage.
    • Click GO on the Apply/Manage a License and Service Requests tile.
    • If you do not have a DELPROS user account, click the REGISTER button on the left side of page for NEW USERS.
    • If you already have a DELPROS user account, enter your email address and password on the right side for EXISTING USERS and click the LOGIN button.
    • DELPROS allows you to save your incomplete application and return to it later to finish the process. You only have six (6) months to submit your application once you begin.
      • If you do not submit your application within six months of starting it, you will be required to restart the entire online application again.
      • You may check the status of your application online throughout the entire application process by using the “View Application Status” feature in DELPROS on your e-License dashboard.

Examination Applicants

The following requirements apply to applications by examination. The documents that you must submit is determined by whether or not you have a “Journeyman Certificate”. The acceptable “Journeyman Certificate” is one that is issued by a federally-approved HVACR apprenticeship program such as the Delaware Department of Labor.

  • If you have a journeyman certificate, you must submit:
    • Copy of your apprenticeship program Certificate of Completion.
    • Proof of at least two years of works experience under the supervision of a master licensee after receiving a Certificate.
  • If you do not have a journeyman certificate, you must submit:
    • Proof of at least seven years of works experience under the supervision of a master licensee.
    • The Board will review your experience and if approved, you will be notified that you may take the Apprenticeship By-Pass Exam, offered by Delaware apprenticeship schools. After you receive approval notification, you may call one of the following schools to schedule your test date:
      • Castle County – New Castle County VoTech (302) 683-3643
      • Kent County – PolyTech H.S. (302) 697-4545
      • Sussex County – Sussex Tech, Georgetown (302) 856-9035
    • Arrange for the Board to receive the exam results after you pass the exam with at least 70%.

When the Board approves you to sit for the Master exam, the Board office will send you a candidate information packet. For more information about the Master's exam, see Examinations.

Reciprocity Applicants

The following requirements apply to applications by reciprocity.

If none of the jurisdictions where you hold a current license has licensure standards that are “substantially similar” to those of Delaware, proof of experience is required. The table below shows whether to submit proof of experience.

IF you hold a current Plumber license in any of these states… THEN the licensure standards… AND you…
Connecticut, Iowa, Maryland are substantially similar do not need to submit any proof of experience.
Alabama, Arkansas, District of Columbia, Florida, Georgia, Michigan, New Hampshire, New Jersey, North Carolina, Ohio, Rhode Island, South Carolina, Virginia, West Virginia are not substantially similar must submit proof of your experience under the supervision of a master licensee for at least seven years after licensure.
any state or U.S. territory not listed above must be evaluated by the Board must submit a copy of the other jurisdiction’s law and regulations for evaluation.
Reciprocity Requirements

Applying to take your Master Exam

The Board of Plumbing and HVACR Examiners must approve you to sit for the master examination. See either Plumbing Licensure or HVACR Licensure for additional requirements for licensure by exam.

  • To apply to take the required exam(s), you must first create a DELPROS user account. Go to the DELPROS online portal, and then click on Apply/Manage a License and Service Requests. If you:
    • are already an existing user, log in with your email address and password under the existing user section.
    • have not yet created a DELPROS user account, click on REGISTER.

After creating your user account or logging into the DELPROS online portal, you may begin your application for licensure to take the required exam(s).

When the Board has reviewed and approved your application, you will receive an email notification stating you have been approved to sit for the exam with your candidate information and registration form.

Registering for the Exam

Complete and submit the registration form and examination fee to Prometric, the testing service.

  • Exams are offered in the following Delaware cities. Contact Prometric for the specific locations and times please click here

Re-Taking your exam

Registration Approval forms are good for 6 months. You may re-take the examination two additional times at the next regularly scheduled administrations, without further Board approval. If you fail the exam and wish to re-take it and your form has expired, go to DELPROS and log in to your e-License Dashboard. Click on Service Request in the top navigation bar, then click APPLY FOR A NEW SERVICE REQUEST and select the Request for Re-Examination service request type option.

  • If you fail to earn a passing score after taking the exam a total of three times, you must wait a year from the date you last took the exam and reapply in DELPROS to request approval from the Board for permission to re-take the exam. For more information, see either the Plumbing or HVACR licensure requirements section of the Board’s Rules and Regulations.
  • After review and approval of your request, you will receive an email notification for approval to re-take the exam.

For more information, see either the Plumbing or HVACR licensure requirements section of the Board’s Rules and Regulations.

After review and approval of your request, you will receive an email notification for approval to re-take the exam.

Passing the Exam for the Plumbing or HVACR License

  • You must obtain a minimum score of 70% to pass the exam. After you pass the exam, allow up to two weeks for the Board office to receive your official examination score. When the Board office receives your passing score and validates that you have met all Plumbing Licensure or HVACR Licensure, your license will be issued.
  • You will receive an email notification stating your license has been issued including any additional details about license renewal and/or continuing education requirements.

Forms for Licensure

Click here for the Verification of Employment application

  • Applicant: Send this form to each employer listed on the application. You may duplicate the form as needed.
  • Applicant Information – to be completed by the applicant

More information can be found in the Frequently Asked Questions