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

Clark County, Washington Plumbing Permit Requirements

Clark County, Washington, through its Building Safety program, oversees construction projects requiring permits in unincorporated areas and the town of Yacolt. A building permit is generally required for all construction work in unincorporated Clark County. This includes work on structural components, plumbing, and mechanical systems, regardless of the project's value. Even if a permit is not required for certain projects, they must still comply with building codes and local regulations, such as setback requirements.

For properties located in unincorporated areas of Clark County, a building permit is mandatory for all construction activities. This applies to various projects, from minor residential remodels to large commercial buildings. The county enforces the 2021 Washington State Building Code, including amendments, as well as the 2021 Washington State Residential Code and the Washington State Energy Code.

Plumbing permits are specifically required for the installation of any plumbing fixtures, including water heaters, toilets, and sinks. For new construction or additions, plumbing permits are typically included within a Residential Combination Permit. However, separate permits may be needed for specific items like lawn sprinklers or wood stoves.

While many construction projects require permits, some are exempt. These exemptions generally include one-story detached accessory structures under 200 square feet (provided they do not involve plumbing, electrical, or mechanical work), fences up to 7 feet high, and retaining walls up to 4 feet high (unless supporting a surcharge). Minor repairs and certain agricultural structures may also be exempt. It is crucial to verify specific exemptions with the Permit Center, as work that is exempt from a permit still must meet building code requirements.

Electrical permits are handled by the Washington State Department of Labor and Industries (L&I), Electrical Division, not by Clark County directly. Homeowners or contractors must obtain these permits and schedule inspections through L&I.

The application process for permits is primarily managed online through Clark County's Land Management System (CC LMS). This system allows for online registration, application submission, fee payment, and permit tracking. In-person services at the Permit Center require an appointment.

Resources to Learn More

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

Washington Plumbing Legislation, Codes, and Guidelines

Plumbing Codes and Legislation in Washington State

The state of Washington regulates plumbing systems through the adoption of the 2021 Uniform Plumbing Code (UPC), which is published by the International Association of Plumbing and Mechanical Officials (IAPMO). This model code is adopted by reference and modified by state-specific amendments to create the Washington State Plumbing Code, codified under Chapter 51-56 of the Washington Administrative Code (WAC). These regulations are established under the authority of the Revised Code of Washington (RCW) Chapter 19.27, which governs the State Building Code.

Primary State Agencies

Two primary state entities oversee the plumbing regulatory framework in Washington:

Washington State Building Code Council (SBCC): This council is responsible for the adoption, maintenance, and amendment of the state building codes, including the Washington State Plumbing Code. They regularly review and update these codes to ensure they remain consistent with state safety and health standards.
Washington State Department of Labor & Industries (L&I): This department is the primary authority for the administration of plumber certification, plumbing contractor licensing, and enforcement of professional standards. While the SBCC sets the technical code, L&I manages the workforce and business regulations associated with the plumbing trade, as outlined in RCW Chapter 18.106 and WAC Chapter 296-400A.

It is important to note that while the state sets the minimum standards, local jurisdictions (cities and counties) are responsible for issuing permits and conducting inspections. Local authorities may also adopt additional, stricter amendments to the state code.

Resources to Learn More

Select a City in Clark 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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