How to Find a Licensed Plumber in Washington DC

Washington DC requires all plumbers to hold a DC Plumbing Licenseissued by the DC Department of Consumer & Regulatory Affairs (DCRA). Plumbing is a licensed trade in the District, and any work on water supply, drainage, or gas lines must be performed by a licensed plumber who has pulled the appropriate permits. Hiring an unlicensed plumber in DC creates liability exposure and can void your homeowner's insurance.

Who Regulates Plumbers in Washington DC?

The DC DCRA issues and regulates plumbing licenses for both individual plumbers and plumbing contractor businesses. Licenses fall into tiers: Master Plumber, Journeyman Plumber, and Apprentice Plumber. Only a master plumber may pull permits and run a plumbing business. Verify any plumber's license at dcra.dc.gov or permits.dc.gov by searching by name or license number.

DC also requires plumbing contractors performing residential work to hold a Home Improvement Contractor (HIC) license in addition to their trade license. This requirement applies to all trades in the District. Out-of-state plumbers licensed in Maryland or Virginia cannot legally perform plumbing work in DC without obtaining DC-specific licensure — a fact that many contractors overlook when bidding across the DMV area.

The plumbing licensing exam in DC tests knowledge of the DC Plumbing Code, which is based on the International Plumbing Code with local amendments. Master plumber candidates must pass both a written exam and demonstrate a specified number of hours of journeyman-level experience. These requirements exist to ensure that anyone working on DC plumbing systems has the technical knowledge to do so safely.

What Is the Bond Requirement for DC Plumbers?

Licensed plumbing contractors in Washington DC must carry a $25,000 surety bondas part of their HIC license requirements. This bond is your financial protection if a plumber fails to complete work, abandons a job, or causes water damage through defective installation. The DCRA verifies bond status as part of the licensing database, so you can confirm the bond is active when you look up the plumber's license.

In addition to the bond, DC plumbing contractors must carry general liability insurance. Water damage from a failed plumbing installation can be catastrophic — a burst pipe in a DC row house can damage multiple units and result in claims exceeding $50,000. Verifying that a plumber carries adequate liability insurance is just as important as verifying the license itself. Ask for a certificate of insurance naming you as certificate holder before work begins.

What Risks Come With Hiring an Unlicensed DC Plumber?

Unlicensed plumbers in Washington DC face fines of up to $2,000 per offense, and the DCRA actively investigates complaints. But the risks to you as a homeowner are more severe. Unpermitted plumbing work will not pass inspection, and work performed without a permit may need to be torn out and redone at your expense when you sell the property. In DC's competitive real estate market, unpermitted work discovered during a home sale is a major transaction risk.

The Environmental Protection Agency estimates that household leaks can waste nearly 10,000 gallons of water per year, and faulty plumbing installations are a leading cause of water damage insurance claims. Plumbing work done without inspections lacks the quality verification that permits provide. The DC building inspector exists to catch code violations before they become leaks, floods, or sewage backups.

How Do You Verify a Plumber's License in Washington DC?

Use the DCRA's online licensing portal at dcra.dc.gov to search for a plumber by name or license number. Confirm the license type is “Master Plumber” or “Journeyman Plumber” as appropriate, the status shows “active,” and the expiration date is current. Also verify the HIC license and bond status for the plumbing contractor entity.

CheckLicensed.commakes DC plumber verification instant. Enter the plumber's name or license number, select Washington DC, and get a report showing license status, bond information, and any disciplinary history — all for $0.99. For any plumbing project in your DC home, that verification is the lowest-cost insurance you can buy.

Never let a plumber start work on your DC property without first confirming their license is active. Ask for the license number upfront, verify it yourself, and ensure the business entity also holds a valid HIC license. Two minutes of verification before a plumbing project can prevent months of water damage remediation and legal disputes.