Kansas City Plumber License

Kansas City's Licensing Structure

Kansas City manages plumbing licenses through its Development Services Department, with applications handled via the CompassKC online portal. The city's requirements are among the most accessible in Missouri — lower experience thresholds, no apprentice registration fee, and a faster path from journeyman to master than most other jurisdictions.

Apprentice to Journeyman

KC does not charge an apprentice registration fee, though you must be employed within an approved program under a licensed master plumber's supervision. After accumulating two years of verified plumbing experience, you can apply to sit for the journeyman exam.

That two-year threshold is among the shortest in the state. St. Louis City and St. Louis County require five years of apprentice experience for the same credential.

To prove your hours, submit employer verification letters confirming dates of employment, scope of work, and the supervising master's license number. The Development Services Department reviews these before authorizing your exam.

Journeyman to Master

Kansas City requires just one year of active experience as a licensed journeyman before you can apply for the master exam. You also need two reference letters from licensed plumbers who can attest to your competence and character.

The combined timeline — two years as an apprentice plus one year as a journeyman — means a motivated plumber can hold a master card in Kansas City within three years of entering the trade.

Exams and Passing Scores

Kansas City accepts Prometric or ICC trade exams. The passing score is 70% for both the journeyman and master levels. Score reports must be submitted to the Development Services Department to receive your trade card.

Card fees are $60 for both journeyman and master licenses.

Contractor Licensing

To operate a plumbing contracting business in Kansas City:

• Business license and state sales tax registration are prerequisites
• Application fee: $60 plus $181 issuance fee
• General liability insurance: $1,000,000 per occurrence, with the City of Kansas City named as an additional insured on the certificate
• Workers' compensation: Required for any construction firm with one or more employees
• Tax clearance: You must obtain a local Statement of Clearance from the city collector of revenue

Kansas City does not require a traditional surety bond — compliance is verified through the business license process instead. This is unusual among Missouri jurisdictions.

Permits and Inspections

The city requires permits for installing, enlarging, altering, repairing, or replacing any plumbing or fuel gas system. Minor repairs — replacing faucet washers, fixing leaks under 12 inches of exposed pipe — are generally exempt.

Once a permit is pulled, you schedule inspections at three stages: ground rough (before pouring concrete), rough-in (before closing walls), and final (after fixtures are set). Staged pressure testing on supply and DWV systems is required before inspection sign-off.

Kansas City adopted the 2018/2021 International Plumbing Code (IPC), though local building ordinances include modifications. The city's February 2026 energy code rollback relaxed some residential construction requirements but did not change plumbing code standards.

Getting Started

Register for a CompassKC account, gather your employer verification letters, and contact the Development Services Department to confirm the current exam authorization process. The Missouri Plumber License Guide includes KC-specific checklists and a side-by-side comparison with other Missouri jurisdictions for plumbers who plan to work across metro-area borders.

See more Missouri guides →