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Licensed in Missouri is not a meaningful claim for a plumber, because there is no single Missouri plumbing license to hold. The state statute pushes certification down to a locally appointed board in each city of fifteen thousand or more, and the Missouri Supreme Court held decades ago that the chapter does not reach constitutional charter cities at all. The useful question is which city or county board issued the certificate.
RSMo 341.010 provides that any person engaging or working at the business of plumbing in cities or towns of fifteen thousand or more inhabitants, either as master plumber or journeyman plumber, shall first receive a certificate under sections 341.010 to 341.080. RSMo 341.040 then puts the examining board inside the city: three members, one being the chairman of the city board of health, one a master plumber and one a journeyman, appointed by the mayor and approved by the council.
The limitation is the part that matters. An annotation printed under 341.040 records a 1977 holding that chapter 341 is not applicable to a constitutional charter city because of Article VI, Section 22 of the Missouri Constitution, citing State ex rel. Sprague v. City of St. Joseph. In Missouri’s charter cities, the state chapter is inoperative and plumbing licensing is purely a matter of local ordinance.
A separate track, RSMo 341.090 to 341.220, sets up a Uniform Plumbing Code applying only to first class counties, and only once the county commission finds it necessary for public health and safety and enters that finding of record. Under it a master plumber must post a surety bond before licensure, at a dollar figure that has not been revisited since the 1940s.
The practical upshot for a Missouri homeowner is that a plumber’s credential is a municipal document. It is checkable, but you have to know which office to check with.
With no state register to fall back on, the verification work shifts to you and to the municipality. It is still quick, but it is a phone call rather than a website in most Missouri jurisdictions.
General information, not legal advice. Missouri’s plumbing statutes date to the 1930s and 1940s and their application depends on your city’s charter status and your county’s classification, so confirm with the licensing office in the jurisdiction where the work will be done.
Not in the way people expect. RSMo 341.010 requires a certificate for anyone working at plumbing in cities or towns of fifteen thousand or more inhabitants, but RSMo 341.040 puts the examining board inside each city, appointed by the mayor and approved by the council. The credential is municipal, so ask which city issued it.
An annotation under RSMo 341.040 records a 1977 holding that chapter 341 is not applicable to a constitutional charter city, because of Article VI, Section 22 of the Missouri Constitution, citing State ex rel. Sprague v. City of St. Joseph. In those cities plumbing licensing rests entirely on local ordinance.
It depends where. RSMo 341.090 to 341.220 create a Uniform Plumbing Code applying only to first class counties, and only after the county commission finds it necessary and enters that finding of record. Under that track a master plumber posts a surety bond, at a figure set in the 1940s and not updated since. Elsewhere, ask for liability insurance instead.
Call the building or licensing office of the city or county where the work will be done and give them the license number. There is no single statewide register to search, which is why the question of who issued the license comes before the question of whether it is valid.