Does Missouri require a plumbing license?
Edited by John Voll. Last verified .
Our survey of official Missouri sources found no state-level plumbing contractor license. Check with the city or county where the work is done. The main local licensing offices are listed below.
Who licenses plumbing work in Missouri
| Credential | No state license: cities and counties |
|---|---|
| Board | None at state level (cities and counties) |
| Official lookup | No state lookup: check with the city or county. |
Where licensing happens locally
These local offices license trades in Missouri. Check the credential list for plumbing work, and ask the building department where the work is done if your city is not listed.
| Jurisdiction | Agency | Credentials | Lookup |
|---|---|---|---|
| Kansas City | City Planning and Development Department, Permits Division source | Contractor License, Certificate of Qualification, Master Electrician, Electrical Supervisor, Master Plumber, Journeyman Plumber, Mechanical Supervisor, Master Pipe Fitter | No online lookup found |
| St. Louis City | City of St. Louis License Collector source | Construction Industry Contractor Graduated Business License | No online lookup found |
| St. Louis County | St. Louis County Department of Transportation and Public Works source | No online lookup found | |
| Springfield | City of Springfield Building Development Services source | City contractor license, Master Electrician, Master Mechanic, Master Plumber | Search Springfield licenses |
Hiring a plumbing contractor?
See every official lookup in Missouri, which board covers which trade, and what to check before you hire.
Questions
- Do you need a plumbing license in Missouri?
- Our survey of official Missouri sources found no state-level plumbing contractor license. Check with the city or county where the work is done.
Other trades in Missouri
- General contractor license in Missouri
- Electrical license in Missouri
- HVAC license in Missouri
- Roofing license in Missouri
- All Missouri trades
Plumbing license in other states
- Alabama
- Alaska
- Arizona
- Arkansas
- California
- Colorado
- Connecticut
- Delaware
- Florida
- Georgia
- Hawaii
- Idaho
- Illinois
- Indiana
- Iowa
- Kansas
- Kentucky
- Louisiana
- Maine
- Maryland
- Massachusetts
- Michigan
- Minnesota
- Mississippi
- Montana
- Nebraska
- Nevada
- New Hampshire
- New Jersey
- New Mexico
- New York
- North Carolina
- North Dakota
- Ohio
- Oklahoma
- Oregon
- Pennsylvania
- Rhode Island
- South Carolina
- South Dakota
- Tennessee
- Texas
- Utah
- Vermont
- Virginia
- Washington
- West Virginia
- Wisconsin
- Wyoming
Sources
- https://pr.mo.gov/
- https://bizcare.kcmo.gov/contractor-licensing
- https://www.stlouis-mo.gov/government/departments/license/business-license-info/Construction-Contracting-Business.cfm
- https://stlouiscountymo.gov/st-louis-county-departments/transportation-and-public-works/mechanical-licensing/
- https://www.springfieldmo.gov/263/Trade-Certifications
- https://www.springfieldmo.gov/1733/Business-License-Search
This is not a government site. The licensing board's own record governs; always confirm on the official lookup. Information as of October 6, 2026.