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Delaware
Plumbers in Delaware
18 plumbing businesses in the metro area within about 35 miles of Wilmington – plus how Delaware licenses plumbers.
Metro areas
Delaware cities we cover
Delaware rules
Do plumbers need a license in Delaware?
How Delaware licenses plumbers
Plumbers are licensed by the state.
License types: Master Plumber.
Businesses: Under 24 Del. C. ยง 1807, no one may provide plumbing services in Delaware unless licensed as a master plumber or working under the supervision of a master plumber who is their employer.
Check a license: delpros.delaware.gov
Confirm through the Division of Professional Regulation's license verification that the plumber, or the plumber's employer, holds an active Delaware master plumber license.
Sources: dpr.delaware.gov, delcode.delaware.gov, delcode.delaware.gov. Checked October 2026 from official sources. This is not legal advice.
Before you hire
Ask for the license number and check it on the official lookup where one exists. Ask for proof of insurance and a written, itemized estimate, and ask who pulls the permit if the job needs one – water heaters, repiping and sewer lines often do.
Questions
Delaware plumbing questions
Do plumbers need a license in Delaware?
Delaware licenses plumbers statewide through the Delaware Board of Plumbing, Heating, Ventilation, Air Conditioning and Refrigeration Examiners (Division of Professional Regulation). You can check a license at delpros.delaware.gov.
Where in Delaware do you list plumbers?
In Delaware: Wilmington (20). Each city page lists plumbers based within about 25 miles (35 in smaller metro areas) whose own website names that city or nearby towns.
How do I get a plumber listed in Delaware?
Plumbing businesses can add their business free. We check every listing against the business’s own website.
Neighboring states: Maryland · Pennsylvania · New Jersey.
Free plumber request
Tell us the problem. We’ll connect you with a local plumber in Delaware.
- 1Tell us the job and your ZIP code
- 2We send it to listed plumbers who serve your area
- 3They contact you directly
Free, no obligation. If no listed plumber serves your area, we’ll tell you. Water pouring in? Shut off the main valve first, then call a plumber from the list.