District of Columbia Plumber License Requirements (2026)

The DC Department of Licensing and Consumer Protection (DLCP) Board of Industrial Trades regulates plumbers and gasfitters. DC has apprentice, journeyman, and master credentials, including plumber/gasfitter categories. A journeyman route generally requires four years and 8,000 hours as an apprentice; a master applicant must hold, or qualify for, the journeyman credential and have four years of journeyman work. A District trade permit is issued to a licensed and bonded master trade professional or licensed DC trade contractor, so an individual credential and a contractor-business authorization are separate compliance questions.

Regulatory Body

Under D.C. Official Code §§ 47-2853.121–.123 and § 47-2853.12, District of Columbia Department of Licensing and Consumer Protection — Board of Industrial Trades (DLCP) is the body that issues this license and enforces compliance with it. DLCP staffs the Board of Industrial Trades, which licenses DC plumbers and gasfitters and processes trade-contractor requirements.

• Official portal: https://dlcp.dc.gov/page/board-industrial-trades1
• Address: 1100 4th Street SW, Washington, DC 20024
• Phone: (202) 671-4500

Eligibility Requirements

Applicants must be at least 18 years old. Applicants must provide a Social Security Number. The published Board materials do not impose a DC-residency requirement.

Good moral character

DLCP applies the District’s general occupational-license eligibility criteria; answer the current application completely and provide any information the Board requests.

Background investigation

Use the current DLCP application instructions. The public plumbing instructions list identification, experience or completion records, and payment information rather than a separate fingerprint requirement.

Experience and Education

Plan to substantiate 8 years of Journeyman applicants generally document at least 8,000 apprentice hours over four years. A Master Plumber/Gasfitter or Master Gasfitter applicant must have a valid journeyman license (or meet the journeyman requirements) and at least four years of journeyman work; this normally makes the master route eight years or more. with hard records. Payroll, tax, project logs, and supervisor verification are what the board relies on when it reviews the claim.

Accepted proof of experience or eligibility

• Employment-verification letter(s) describing experience and signed by the supervising master
• Tax records requested by DLCP for the examination route
• For an apprenticeship waiver, completion certificate, formal designation, or official transcript

Education substitution

A mechanical-engineering degree plus two years of verified practical experience is a statutory journeyman alternative. The Board may also accept comparable education and experience. A qualifying nationally certified apprenticeship can replace the journeyman examination and standard experience route under the statute.

Exam Requirements

Testing provider or authority: PSI (schedule through the District of Columbia examination program after following DLCP instructions). 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:

• DC plumber or gasfitter examination — question count: confirm with the authority, timing: confirm with the authority, passing score: confirm in the current candidate bulletin

Examination fee: DLCP directs applicants to PSI; the current Board fee schedule refers examination and re-examination fees to 17 DCMR § 3500.3 rather than publishing one plumbing exam price.

Retake policy: Follow PSI and DLCP’s current examination and re-examination instructions. Do not rely on older code-book editions or fixed question-count claims.

Insurance and Bonds

The DLCP requires a $5,000 contractor license surety bond to be on file before the license will issue.

General liability

The Board’s published trade-contractor materials require a bond and a designated DC-licensed master. They do not state a general-liability minimum for every individual plumber license; project, employer, and business requirements can add coverage obligations.

Workers' compensation

Employers must comply with applicable DC workers’ compensation law. Confirm the required coverage for the business and project.

Additional financial requirements

No individual-plumber financial-statement requirement is identified in the published Board instructions.

Fee Schedule

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 District of Columbia plumber.

Renewal and Continuing Education

Renewal of the DC Master Plumber/Gasfitter and Journeyman Plumber comes due every 2 years. As cited, the renewal fee stands at $155. Master renewal is $155; Journeyman renewal is $110 under the published DLCP schedule. Licenses expire March 31 in even-numbered years.

Continuing education: The general statute allows a board to set continuing-education conditions, but DLCP’s current Board page does not publish a plumbing CE-hour total. Check the live renewal application and Board notices.

Reciprocity

The NASCLA Accredited Examination is not accepted by District of Columbia for this classification.

District law also provides a general waiver route for equivalent, reciprocal state credentials or qualifying national certification, subject to Board standards and any DC-law/procedure examination the Board requires. Do not assume Virginia or another jurisdiction is automatically reciprocal.

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 District of Columbia's requirements against the bordering jurisdictions before committing to an application:

• Maryland Plumber License Requirements — Maryland Master Plumber/Gas Fitter
• Virginia Plumber License Requirements — Virginia Master Plumber Tradesman License

Step-by-Step Application Roadmap

1. Choose the credential and work scope. DC separately recognizes plumbing, gasfitting, and combination categories. Confirm the appropriate journey or master category before applying.
2. Build and document the journeyman qualification. Use the 8,000-hour/four-year apprentice route, the mechanical-engineering alternative, an accepted equivalent route, or a qualifying nationally certified apprenticeship.
3. Qualify for the master level. Document four years as a journeyman after holding, or otherwise meeting the requirements for, the journeyman credential.
4. Apply and complete the current examination process. Submit DLCP’s current application, identification, experience evidence, and fees. Schedule any required exam through the DC PSI program.
5. Address contractor and bond requirements before contracting. A trade-contractor business needs the Board’s required documentation, a designated DC-licensed master, and the applicable bond. The plumbing/gasfitting bond form specifies $5,000 for a contractor or designated master.
6. Use the correct permit pathway. DOB says plumbing trade permits are issued only to licensed and bonded master trade professionals; scope may also require a licensed DC trade contractor and project approvals.

Application Checklist

The items below are the ones worth confirming before the application is filed with DLCP:

• Current DLCP Board of Industrial Trades application and government-issued identification
• Employment-verification letters and tax records for the experience route
• Apprenticeship completion/designation/transcript materials if seeking the journeyman waiver
• PSI examination completion if required for the selected route
• Maryland license verification if applying under the published Maryland reciprocity pathway
• For a trade-contractor business: entity documentation, designated DC master, and required $5,000 bond
• DOB trade permit for permit-required work

Progress is saved in this browser, so you can return to this checklist while your application is in flight.

Common Filing Mistakes

Based on the board's own instructions and the sources cited here, the problems below are what most often stall a District of Columbia Plumber application.

Counting apprentice time as master experience

The master route requires four years of journeyman work after the applicant holds, or otherwise satisfies, the journeyman requirements.

Assuming every out-of-state license is reciprocal

Maryland is the currently announced plumbing reciprocity route. Other requests depend on equivalency, reciprocal treatment, and Board review.

Skipping the contractor-bond analysis

A personal credential does not complete a trade-contractor filing. The designated master and contractor bond requirements must be addressed before the business contracts for work.

Using old PSI details as current rules

The published older handout references historic code editions. Confirm the live PSI/DC examination material before studying or scheduling.

Study and Reference Materials

What follows are the regulator-cited and commonly used preparation references for this trade. They appear here for convenience only; CLR takes no compensation for them.

• Current DC plumbing/gasfitting examination information — DLCP / PSI. Use the current PSI listing and Board instructions; DLCP’s older one-page handout identifies historic books, not a reliable current test specification.
• D.C. Official Code §§ 47-2853.121–.123 — District of Columbia Council. Primary source for scope, eligibility, and title protection.
• DC Construction Codes and DOB permit guidance — DC Department of Buildings. Confirm the applicable code edition and permit path for the project.

Other District of Columbia Trade Licenses

Should the Plumber path not apply, these other District of Columbia trade guides from CLR may help:

• District of Columbia General Contractor License Requirements
• District of Columbia Electrician License Requirements
• District of Columbia HVAC Technician License Requirements
• District of Columbia Roofing Contractor License Requirements
• District of Columbia Painting Contractor License Requirements
• District of Columbia Landscaping Contractor License Requirements
• District of Columbia Masonry Contractor License Requirements
• District of Columbia Concrete Contractor License Requirements
• District of Columbia Carpentry Contractor License Requirements
• District of Columbia Solar Installer License Requirements
• District of Columbia Low-Voltage Technician License Requirements
• District of Columbia Fire Sprinkler Contractor License Requirements
• District of Columbia Home Inspector License Requirements
• District of Columbia Pool Contractor License Requirements
• District of Columbia Handyman License Requirements
• District of Columbia Pest Control License Requirements
• District of Columbia Septic Contractor License Requirements

Frequently Asked Questions

How much experience does DC require for a master plumber?

A master applicant must hold, or meet the requirements for, a journeyman credential and have worked as a journeyman plumber or gasfitter for at least four years. The standard journeyman route itself is 8,000 hours over at least four years.

Can an apprenticeship replace the DC journeyman exam?

Yes, the statute allows a qualifying nationally certified apprenticeship—one that includes completion, examination, journeyman designation, and no disqualifying discipline—to be accepted in place of the journeyman examination and standard experience route.

Does DC have plumbing reciprocity?

Yes, DLCP currently identifies Maryland journey and master plumber/gasfitter reciprocity for licensees who were licensed by examination and remain in good standing. Other waiver requests depend on the statute and Board determination.

Does a Master Plumber need a bond?

The published plumbing/gasfitting bond form requires a $5,000 bond for a contractor or designated master. Verify the role you will have in the contractor business before filing.

When do DC plumbing licenses renew?

DLCP lists plumbers and gasfitters as expiring March 31 in even-numbered years; its fee schedule uses terms of up to two years.

Report a correction to this guide