Plumbing Installation Licensing in Missouri
Indexation gate: passedMissouri plumbing rough-in: Plumbing contracting is regulated exclusively at the municipal and county levels. In major counties like St. Louis County, plumbers must hold a county Master Plumber license, pass standardized exams, post a $10,000 surety bond, and pull municipal plumbing permits.
Applicable Missouri Statutory Requirements
Absence of Statewide Trade Licensing for Mechanical Trades
mo:statute:rsmo-324Missouri has no statewide licensing board for electricians, plumbers, or HVAC mechanics. Trade licensing is administered and enforced exclusively at the local county or municipal level.
Locator: RSMo Chapter 324 Table of Sections
County and Municipal Contractor Licensing Framework
mo:statute:const-art6Under Missouri Home Rule powers, major metropolitan areas (including St. Louis County, Kansas City, and the City of St. Louis) enforce mandatory contractor licensing, examination requirements, and surety bonding before permits can be issued.
Locator: Mo. Const. art. VI, § 19
Missouri Construction Industry Workers' Compensation Mandate (1+ Employees)
mo:statute:rsmo-287Under RSMo § 287.030.1(3), all employers in the construction industry that erect, demolish, alter, or repair buildings must carry workers' compensation insurance if they employ one or more employees (in contrast to the 5-employee threshold for non-construction businesses).
Locator: RSMo § 287.030.1(3)