Verify a plumber licence in Delaware

Check a plumber's licence in Delaware by number or by business name and get one normalized JSON record back, sourced from the Division of Professional Regulation (DPR).

Try a free lookup — no signup, right here on this page. For programmatic access, take a free API key — 250 requests a month, no card. Also on RapidAPI and, if you would rather not write code at all, the Apify Store.

Which DE classifications count as plumbers

• Master Plumber — The only plumbing licence Delaware issues

A record's classifications array carries these codes, so you can tell a licence that covers the work from one that merely exists.

Run it

curl "https://contractor-license-verification2.p.rapidapi.com/v1/licenses/DE/PL-0000001" \
  -H "X-RapidAPI-Key: YOUR_KEY" \
  -H "X-RapidAPI-Host: contractor-license-verification2.p.rapidapi.com"

PL-0000001 is a real DE licence (DANIEL DAUPHIN) in this trade, so that call works as written.

Before you rely on it

One licence, one holder, one person: PL numbers name an individual master plumber. The plumbing company they work for is not licensed by the state and is not in this register.

What Division of Professional Regulation does not publish

• General contractors — Delaware does not license them
• Company names — every trade license is held by a person
• Street address
• Surety bond
• Workers' compensation
• General liability insurance
• Disciplinary actions

Full coverage detail, including the caveats that apply to every Delaware lookup, is on the Delaware page.

Other trades in Delaware

Plumbers in other states