Maryland, Washington County Plumbing Permit Regulations and County Ordinances for Unincorporated Areas

Washington County, Maryland Plumbing Permit Requirements

In Washington County, Maryland, a plumbing permit is required for any work that involves adding or relocating plumbing fixtures, such as sinks, bathrooms, or wet bars. The Division of Permits and Inspections is responsible for enforcing state and county codes related to construction and remodeling projects to ensure safety and legal compliance. Unpermitted work can lead to stop-work orders, costly rework, and delays.

For properties in unincorporated areas of Washington County, permits are generally required for new construction, alterations, additions, and related work. The county's permit authority covers these unincorporated areas, though municipalities may have their own zoning, historic, stormwater, or local review requirements.

Key Requirements and Procedures:

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Note: The following state-wide building codes and regulations apply universally to all jurisdictions within Maryland, including Washington County.

Maryland Plumbing Legislation, Codes, and Guidelines

Maryland Plumbing Code and Legislation

The state-level plumbing standards in Maryland are primarily governed by the Maryland Board of Plumbing, which operates under the Maryland Department of Labor. The state adopts model codes published by the International Code Council (ICC) to establish minimum installation standards for plumbing systems, including potable water, drain-waste-vent (DWV) systems, and fuel gas piping.

While Maryland establishes statewide standards, it is important to note that certain jurisdictions, specifically Baltimore County and areas served by the Washington Suburban Sanitary Commission (WSSC), maintain their own independent licensing requirements and may enforce their own specific plumbing codes. Practitioners should always verify the specific code edition and any local amendments with the local authority having jurisdiction (AHJ) where the work is being performed.

Resources to Learn More

Select a City in Washington County

If your project is located within incorporated city limits, you will likely need to follow municipal ordinances rather than county rules. Select your city below to view local regulations.

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