Washington Plumbing Specialty Contractor License
The Plumbing Specialty Contractor License allows you to do the following work:
- Install, alter, repair and renovate:
- All potable water pipes
- Building supply pipes
- Distribution pipes
- All plumbing fixtures and traps
- All drainage and vent pipes
- All building drains and building sewers, including their respective:
- Joints
- Connections
- Devices
- Receptors
Appurtenances within the property lines of the premises and shall include:
- Potable water piping
- Potable water treating or using equipment
- Medical gas and medical vacuum systems
- Liquid and fuel gas piping
- Water heaters
- Hydronic heating systems and vents
Includes solar heating equipment attached to potable water systems. Plumber certification is required for work within a building.
How to Get the Plumbing Specialty Contractor’s License in Washington?
- Determine the business type and register with the Department of Revenue:
- If setting up a sole proprietor or partnership, determine the business name
- If starting a Limited Liability Company (LLC) or a Corporation, refer to the Secretary of State for information on how to incorporate the business
- Complete and get a Washington Continuous Contractor Surety Bond for the required amount
- Purchase a general liability insurance policy for the required amount
- Fill out an Application for Contractor Registration with notarized signatures. If unsure of how to correctly fill out the application form, the Washington State Department of Labor & Industries offers help with the application and business registration to those who visit their local offices
- Gather all the previous documents and send them with the registration fee to:
Washington State Department of Labor & Industries
Contractor Registration
P.O. BOX 44450
Olympia, WA 98504-4450
It is also possible to visit a local office to deliver all the documents and fees - Expect a registration card from the Washington State Department of Labor & Industries after the application is processed
- Note that once the business has been registered, it will be listed in the Washington State Department of Labor & Industries Verify a Contractor, Tradesperson, or Business website