Kentucky Master Plumber License Requirements (2026)

Kentucky licenses master and journeyman plumbers statewide through the Department of Housing, Buildings and Construction, Division of Plumbing. KRS Chapter 318 and 815 KAR Chapter 20 govern the licensing path, examinations, insurance, and renewal. A journeyman works under the applicable master-plumber supervision; a master license is the credential used to obtain permits and conduct the plumbing work governed by Chapter 318.

Regulatory Body

Authority over this credential rests with Kentucky Department of Housing, Buildings and Construction — Division of Plumbing (KY Plumbing), which issues and polices it under KRS Chapter 318; 815 KAR Chapter 20. Licenses master and journeyman plumbers and administers the Kentucky State Plumbing Code and plumbing examination program.

Official portal: https://dhbc.ky.gov/Plumbing/Pages/default.aspx
Address: 500 Mero Street, Frankfort, KY 40601
Phone: (502) 573-0397

Eligibility Requirements

Applicants must be at least 18 years old. Check the current application for identification and tax-number requirements. Kentucky residence is not a statutory qualification. Applicants must be U.S. citizens or resident aliens authorized to work in the United States.

Good moral character

KRS 318.040 requires good moral character for a master or journeyman plumber license.

Background investigation

The statute and current licensing regulation reviewed do not prescribe a separate criminal-background-check requirement.

Experience and Education

At least 2 years of For Journeyman, either two consecutive years as an apprentice plumber, or a department-approved plumbing/Kentucky State Plumbing Code course plus at least one year as an apprentice. For Master, the standard route requires a valid journeyman license for at least two of the previous five years and two years of active plumbing employment under a licensed master plumber; 815 KAR 20:030 also provides specified engineering and out-of-state experience routes. has to be evidenced and confirmed. Retain payroll, tax, project, or supervisor records, since the board may audit the experience claimed.

Accepted proof of experience or eligibility

Application for License as a Journeyman Plumber (Form PLB-2) or Master Plumber (Form PLB-1)
Experience and licensing documentation required for the applicable route
Proof of the required Kentucky examination result

Education substitution

A department-approved course on plumbing practice or the Kentucky State Plumbing Code may be paired with one year of apprentice experience for the Journeyman route; do not assume other classroom-hour substitutions without written confirmation from the Division.

Exam Requirements

Testing provider or authority: Kentucky Department of Housing, Buildings and Construction, Division of Plumbing. The following examination requirements cover the pathways described in this guide; follow each part's classification, waiver, and local-scope conditions. Unpublished format details do not remove an examination requirement:

Master Plumber examination — question count: confirm with the authority, 150 minutes, passing score 80%
Journeyman Plumber written, drawing, and practical examination — question count: confirm with the authority, 300 minutes, passing score 75%

Examination fee: Master: $150; Journeyman: $50 (nonrefundable examination fees).

Retake policy: An applicant who does not complete the examination within one year after the first notice has a void application. A journeyman applicant may retake only a failed examination portion, but must pay the full examination fee for a retake. A passing score remains valid for three years.

Insurance and Bonds

No statewide contractor license surety bond is required for this credential in the cited sources. Project-specific, permit, or public-works bonds may still apply, so confirm bonding before bidding a given job.

General liability

A person, firm, or corporation engaging in plumbing must maintain at least $250,000 in general liability insurance. Proof is required before issuance or renewal of the active master plumber license; the requirement does not apply to an employee of the insured plumbing business.

Workers' compensation

The plumbing statute requires proof of compliance with Kentucky workers’ compensation and unemployment-insurance laws. Confirm the business’s coverage obligations with the appropriate Kentucky agencies.

Additional financial requirements

No state financial-statement or surety-bond amount is specified in the licensing provisions reviewed.

Fee Schedule

Fee	Amount
Application	No separate amount recorded; confirm in the fee guidance
Examination	$150
Initial license	$250
Renewal (every year)	$250

To turn these board fees into a realistic year-one budget — bond premium, liability insurance, and exam prep included — open the cost calculator preloaded for Kentucky plumber.

Renewal and Continuing Education

The Kentucky Master Plumber (and Journeyman Plumber) must be renewed every year. The fee to renew is presently $250. Master renewal is $250 and Journeyman renewal is $60. Renewed licenses expire on the last day of the licensee’s birth month.

Continuing education: At least six hours of approved continuing education during the 12 months before renewal (with the general first-renewal exception). Plumbing CE must relate to business, safety, the Kentucky State Plumbing Code, or the plumbing trade.

Downloadable Asset

2026 Kentucky Plumber License Roadmap (PDF) — a printable step-by-step checklist for the application process.

Download the PDF roadmap →

Reciprocity

Kentucky grants no NASCLA reciprocity for this classification.

Reciprocal State	Accepted Exam	Conditions
No formal bilateral reciprocity agreements identified.

Kentucky may issue a license to an out-of-state licensee only when the other state has a statewide plumbing code, its examination is at least equal to Kentucky’s, and that state agrees to reciprocate. The statute does not name partner states; confirm any current agreement with the Division before applying.

Weighing more than one jurisdiction? The national hub compares published Plumber license requirements by state — exam, bond, fee, and experience thresholds side by side.

Plumber Licensing in Neighboring States

Contractors working near a state line, or weighing where to qualify first, should compare Kentucky's requirements against the bordering jurisdictions before committing to an application:

Illinois Plumber License Requirements — Illinois Licensed Plumber and Plumbing Contractor Registration
Indiana Plumber License Requirements — Indiana Plumbing Contractor (and Journeyman Plumber)
Missouri Plumber License Requirements — Missouri Plumber — City and County Licensing
Ohio Plumber License Requirements — Ohio Plumbing Contractor (OCILB Commercial License)
Tennessee Plumber License Requirements — Tennessee CMC-A Plumbing Contractor (LLP Limited Licensed Plumber for projects under $25,000)
Virginia Plumber License Requirements — Virginia Master Plumber Tradesman License
West Virginia Plumber License Requirements — West Virginia Master Plumber (and Journeyman Plumber)

Step-by-Step Application Roadmap

Choose the Journeyman or Master route. Review the experience route in 815 KAR 20:030 and collect the documentation for that route.
Meet the experience requirement. Journeyman applicants need the required apprentice experience (or approved-course alternative). Master applicants must satisfy the journeyman, engineering, or qualifying out-of-state route.
Register for the examination. Submit Form PLB-3, the applicable exam fee, and the required current passport-size color photo.
Pass the applicable examination. Exams cover plumbing principles, KRS Chapter 318, 815 KAR Chapters 2 and 20, and pipe sizing. The journeyman exam also has a practical component.
Submit the license application. File Form PLB-1 or PLB-2 with the examination result and applicable license fee.
Provide required business insurance. Before active master-license issuance or renewal, provide the liability insurance and legal-compliance proof required by KRS 318.030.
Renew annually. Renew by the last day of the licensee’s birth month with the applicable fee, continuing education, and any required insurance proof.

Application Checklist

Before submitting to KY Plumbing, the applicant should have each of the following ready:

Confirm the qualifying Journeyman or Master experience route in 815 KAR 20:030
Complete Form PLB-3 and pay the applicable examination fee
Pass each required examination portion
Submit Form PLB-1 or PLB-2 and the applicable initial-license fee
For active Master licensing, submit proof of the required $250,000 general liability coverage and legal insurance compliance
Complete approved continuing education before annual renewal

Common Filing Mistakes

These are the recurring mistakes that most often delay or reject a Kentucky Plumber application, based on the official instructions cited here.

Using an outdated apprenticeship-hour claim

The current Journeyman rule is based on two consecutive years as an apprentice, or an approved course plus one apprentice year; it does not state a 4,000- or 8,000-hour threshold.

Missing an examination portion

Journeyman applicants must pass written, drawing, and practical portions. A passed portion can be retained, but the full exam fee applies to a retake.

Relying on an unconfirmed reciprocity claim

Kentucky’s statute conditions reciprocity and does not list partner states. Obtain confirmation from the Division before planning to waive an exam.

Letting the active Master insurance lapse

The statute makes the required insurance a condition of license validity and requires the carrier to notify the Department if coverage is cancelled.

Study and Reference Materials

The following references are cited by the regulator, used in the application process, or commonly used to prepare for the trade scope. Listed for reader convenience; CLR receives no compensation for these recommendations.

2023 Kentucky Plumbing Law, Regulations and Code Book — Kentucky Department of Housing, Buildings and Construction. Official Kentucky study resource linked by the Division of Plumbing.
KRS Chapter 318 — Kentucky Legislative Research Commission. Licensing, insurance, examination, and renewal law.
815 KAR 20:030 — Kentucky Legislative Research Commission. Current license application, examination, and renewal rule.

Other Kentucky Trade Licenses

For a different Kentucky credential, see these companion guides published by CLR:

Frequently Asked Questions

Who licenses plumbers in Kentucky?

The Kentucky Department of Housing, Buildings and Construction, Division of Plumbing licenses master and journeyman plumbers statewide under KRS Chapter 318.

How much experience is required for a Kentucky Journeyman Plumber license?

The regulation requires either two consecutive years as an apprentice plumber, or a department-approved plumbing/code course plus at least one year as an apprentice.

What does the Kentucky plumbing examination cover?

The examinations cover plumbing principles, KRS Chapter 318, 815 KAR Chapters 2 and 20, and pipe sizing on a prepared drawing. The journeyman exam also includes a practical section.

Does Kentucky have named plumbing reciprocity states?

KRS 318.040 sets conditions for reciprocity but does not name states. Confirm a current agreement with the Division of Plumbing before relying on reciprocity.

How often does a Kentucky plumbing license renew?

A renewed license expires annually on the last day of the licensee’s birth month. Renewal requires the required continuing education; active master renewal also requires the required insurance proof.

Primary Sources

Regulatory requirements on this page are drawn from the official board, statute, and exam-provider materials listed below.

Verified 2026-09-04 · Next scheduled review 2026-12-03

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Corrections and presentation updates

2026-09-30: Corrected examination detection when format details are unpublished and updated the summary layout and requirements score. Source-check dates are unchanged.
2026-09-08: Shared template updated to distinguish unspecified eligibility requirements, retain cost qualifications, and use consistent headings. Source-check dates are unchanged by presentation updates.
2026-09-21: Local-only guides now use a compliance-focused structure and terminology instead of implying a statewide license application. Source-check dates are unchanged by this presentation update.