Working as an HVAC contractor in Delaware requires understanding the state's licensing rules, application process, and regulatory authority.

This guide explains whether Delaware requires an HVAC license, the license types available, the governing agency, and how contractors can apply.

Delaware HVAC License Requirements

At a Glance

Requirement	Details
State	Delaware
License Required	Yes
Licensing Authority	Delaware Division of Professional Regulation - Board of Plumbing, Heating, Ventilation, Air Conditioning, and Refrigeration Examiners
Licensing Model	Statewide plus local
Last Verified	2026-03-10

Does Delaware Require a State HVAC License?

Yes. Delaware DPR board resources and Delaware code establish state HVACR licensing requirements. (Source 1, Source 2, Source 3)

Who Regulates HVAC Licensing in Delaware?

• Agency: Delaware Division of Professional Regulation, HVACR Board
• Authority type: board
• Website: https://dpr.delaware.gov/boards/hvacr/
• Phone: (302) 744-4500
• Email: customerservice.dpr@delaware.gov
• Notes: Board pages include law/rules, forms, and licensing information.

License Types

Master HVACR License

• Scope of work: Contractor-level HVACR work under Delaware board law/rules.
• Who needs it: Contractors performing regulated HVACR contracting activity.
• Key limitations: Scope and supervision requirements apply by credential level.
• Citation(s): Source 1, Source 2

HVACR Apprentice/Journeyperson Pathways

• Scope of work: Individual credential pathways under Delaware board framework.
• Who needs it: Individuals performing regulated HVACR work under applicable supervision.
• Key limitations: Does not replace contractor-level obligations where master-level authority is required.
• Citation(s): Source 1, Source 3

Experience Requirements

• Minimum experience: By examination, applicants without a qualifying journeyman certificate must show at least 7 years under supervision of a master licensee; with qualifying journeyman certificate, at least 2 years under supervision after certificate completion.
• Education substitutions: Unverified
• Apprenticeship pathway: Unverified
• Documented proof required: Unverified
• Exceptions: Unverified
• Citation(s): Source 1, Source 3

Exam Requirements

• Exam required: Yes (board exam framework is published)
• Trade exam: Yes
• Business/law exam: Unverified
• Exam provider: ProV (master licensure exam) and ABC Delaware (apprenticeship by-pass exam).
• Passing score: 70%.
• Retake policy: After 3 failed attempts, applicant must reapply as a new applicant and wait 1 year from last exam attempt.
• Citation(s): Source 8

Application Requirements

• Application form/link: Delaware DPR board applications/forms.
• Application fee: $173 (Master HVACR and Master Restricted HVACR application fee).
• Background check: Unverified
• Insurance requirements: Unverified
• Bond requirements: Unverified
• Financial/responsibility requirements: Unverified
• Processing time (if published): Unverified
• Citation(s): Source 9

Renewal Requirements

• Renewal cycle: Licenses expire October 31 of even-numbered years.
• Renewal fee: Amount is provided at renewal in DELPROS; late fee is 50% of renewal fee.
• Continuing education: Unverified
• Late renewal/reinstatement: Late renewal allowed for up to one year after expiration; after that, reapplication is required.
• Citation(s): Source 9, Source 10

Local Licensing Rules

Delaware state HVACR licensing applies with municipal permit and inspection overlays. This table is baseline-only.

Key Jurisdictions to Check

Jurisdiction	HVAC License / Registration Status	Official Link	Notes
Wilmington (largest city)	Unverified (Jurisdiction page verified)	https://www.wilmingtonde.gov/residents/licenses-and-permits	City permit/license resources are published; HVAC-specific local registration requirements require direct confirmation.
Dover (state capital)	Unverified (Jurisdiction page verified)	https://www.cityofdover.com/permit-applications-and-zoning-certificates	Official permit resources are published; verify local HVAC prerequisites directly.
Newark	Unverified (Jurisdiction page verified)	https://newarkde.gov/166/Permits-Licenses	City permit/license resources are published; HVAC-specific local overlay details are unresolved in this pass.

Reciprocity

• Reciprocity available: Yes.
• With which states/credential pathways: Connecticut and Maryland master HVACR credentials are identified as substantially similar.
• Conditions/limits: For jurisdictions listed as not substantially similar, applicant must show at least 7 years of practice after master licensure; unlisted jurisdictions require board evaluation.
• Citation(s): Source 3

Important Notes

• Delaware has a state HVACR board licensing framework.
• Multiple operational fields (exam, fee, renewal, reciprocity baseline) were upgraded from official DPR board pages in this pass.
• Local permits and inspections still apply by jurisdiction.

Delaware HVAC License FAQ

Do you need an HVAC license in Delaware?

Yes. Delaware requires a state-issued credential, registration, or licensing pathway for at least some contractor-level HVAC work. Review the sections above for license types and application requirements.

Who regulates HVAC licensing in Delaware?

HVAC licensing in Delaware is regulated by Delaware Division of Professional Regulation - Board of Plumbing, Heating, Ventilation, Air Conditioning, and Refrigeration Examiners and, where applicable, local jurisdictions or related trade authorities.

What types of HVAC licenses exist in Delaware?

Delaware uses one or more license or registration types depending on project scope, system type, or trade classification. See the License Types section above for details.

How long does it take to get an HVAC license in Delaware?

Processing times vary in Delaware and may depend on application review, exam scheduling, documentation, and local jurisdiction requirements. Review official sources before applying.

Does Delaware offer HVAC license reciprocity?

Delaware publishes reciprocity or reciprocal recognition in at least some cases. Review the Reciprocity section above and confirm eligibility directly with the licensing authority.

HVAC Licensing in Nearby States

• Maryland HVAC License Requirements
• New Jersey HVAC License Requirements
• Pennsylvania HVAC License Requirements

Sources

1. Delaware Division of Professional Regulation - HVACR Board - https://dpr.delaware.gov/boards/hvacr/ (Accessed: 2026-03-10)
2. Delaware Code Online - Title 24, Chapter 18 (Plumbing, HVACR, etc.) - https://delcode.delaware.gov/title24/c018/index.html (Accessed: 2026-03-10)
3. Delaware DPR - HVACR Board Applications/Forms - https://dpr.delaware.gov/boards/hvacr/newlicensee/ (Accessed: 2026-03-10)
4. City of Wilmington - Licenses and Permits - https://www.wilmingtonde.gov/residents/licenses-and-permits (Accessed: 2026-03-10)
5. City of Dover - Permit Applications and Zoning Certificates - https://www.cityofdover.com/permit-applications-and-zoning-certificates (Accessed: 2026-03-10)
6. City of Newark, DE - Permits and Licenses - https://newarkde.gov/166/Permits-Licenses (Accessed: 2026-03-10)
7. Delaware DPR - Regulations and legal resources - https://regulations.delaware.gov/AdminCode/title24/ (Accessed: 2026-03-10)
8. Delaware DPR - HVACR Examinations (ProV/ABC Delaware, passing score, retake policy) - https://dpr.delaware.gov/boards/plumbers/examinations/ (Accessed: 2026-03-10)
9. Delaware DPR - HVACR/Plumbing Fee Schedule - https://dpr.delaware.gov/boards/plumbers/fees/ (Accessed: 2026-03-10)
10. Delaware DPR - HVACR License Renewal - https://dpr.delaware.gov/boards/plumbers/renew/ (Accessed: 2026-03-10)

Disclaimer

Requirements can change. Confirm current licensing rules with the official authority before applying, testing, bidding, contracting, or performing HVAC work.