Is My Contractor Licensed in Delaware?
Quick answer
Delaware licenses plumbers, HVACR technicians and electricians statewide through boards in the Division of Professional Regulation. Businesses that perform construction services must also register with the Department of Labor's Office of Contractor Registration, and pest control businesses are licensed by the Department of Agriculture. Plumbers: Delaware Board of Plumbing, Heating, Ventilation, Air Conditioning and Refrigeration Examiners. Electricians: Delaware Board of Electrical Examiners. HVAC (heating and air): Delaware Board of Plumbing, Heating, Ventilation, Air Conditioning and Refrigeration Examiners. Roofers: Delaware Department of Labor, Office of Contractor Registration.
Checked September 30, 2026. Every rule below links to the official source; licensing rules change, so confirm with the board before you hire.
Plumbers in Delaware
Licensed by: Delaware Board of Plumbing, Heating, Ventilation, Air Conditioning and Refrigeration Examiners
The board, part of the Division of Professional Regulation, issues master plumber licenses and handles complaints against licensees. Look up the plumber's license in the division's DELPROS License Look-Up before work starts.
Look up a license · Source: Delaware Division of Professional Regulation: Board of Plumbing, Heating, Ventilation, Air Conditioning and Refrigeration Examiners · 9 plumbing companies in Delaware on 1-800Deals
Electricians in Delaware
Licensed by: Delaware Board of Electrical Examiners
The Board of Electrical Examiners licenses apprentices, journeypersons, master electricians and limited electricians, with special licenses limited to specialties such as HVAC. Check the electrician's license in the DELPROS License Look-Up before work starts.
Look up a license · Source: Delaware Division of Professional Regulation: Board of Electrical Examiners · 4 electricians companies in Delaware on 1-800Deals
HVAC (heating and air) in Delaware
Licensed by: Delaware Board of Plumbing, Heating, Ventilation, Air Conditioning and Refrigeration Examiners
The board issues master HVACR and master restricted HVACR licenses; a restricted license limits practice to certain work. Check the technician's license in the DELPROS License Look-Up before work starts.
Look up a license · Source: Delaware Division of Professional Regulation: Board of Plumbing, Heating, Ventilation, Air Conditioning and Refrigeration Examiners · 5 hvac companies in Delaware on 1-800Deals
Roofers in Delaware
Licensed by: Delaware Department of Labor, Office of Contractor Registration
Delaware law requires businesses that perform construction services to register with the Department of Labor's Office of Contractor Registration before work begins, in addition to holding a Division of Revenue business license. Search the roofer in the state's Registered Construction Contractors lookup, or call the department at 302-430-7739 if a contractor is not listed.
Look up a license · Source: Delaware One Stop: Construction Contractors Registration · 1 roofing company in Delaware on 1-800Deals
Pest control in Delaware
Licensed by: Delaware Department of Agriculture
A Delaware Pesticide Business License is required to apply pesticides to another person's property for pay, and the business must employ certified commercial applicators. For structural pest control, at least one certified applicator must have two years of supervised practical experience. The department's Residents or Homeowners page links to its Find a licensed business search.
Look up a license · Source: Delaware Department of Agriculture: Pesticide Business Licenses · 6 pest control companies in Delaware on 1-800Deals
Garage door companies in Delaware
Licensed by: Delaware Department of Labor, Office of Contractor Registration
Businesses that perform construction services in Delaware must register with the Department of Labor's Office of Contractor Registration before work begins and hold a Division of Revenue business license. Search the company in the Registered Construction Contractors lookup before work starts.
Look up a license · Source: Delaware One Stop: Construction Contractors Registration · 3 garage doors companies in Delaware on 1-800Deals
Water damage restoration in Delaware
Licensed by: Delaware Department of Labor, Office of Contractor Registration (for construction work)
Businesses that perform construction services, such as rebuilding after water damage, must register with the Department of Labor's Office of Contractor Registration before work begins. Search the company in the Registered Construction Contractors lookup, and check any plumber or electrician separately in the DELPROS License Look-Up.
Look up a license · Source: Delaware One Stop: Construction Contractors Registration · 7 water damage restoration companies in Delaware on 1-800Deals
Frequently asked questions
Do plumbers and HVAC technicians need a state license in Delaware?
Yes. The Board of Plumbing, Heating, Ventilation, Air Conditioning and Refrigeration Examiners issues master plumber, master HVACR and master restricted HVACR licenses. You can check them in the DELPROS License Look-Up.
How do I check a roofer or other contractor in Delaware?
Businesses that perform construction services must register with the Department of Labor's Office of Contractor Registration. Search the Registered Construction Contractors lookup, or call 302-430-7739 if the business is not listed.
Who licenses pest control companies in Delaware?
The Delaware Department of Agriculture. A Pesticide Business License is required to apply pesticides to another person's property for pay.
This page is general information, not legal advice. 1-800Deals does not license, verify or endorse contractors. See all states: contractor licensing by state.