Washington Irrigation Sprinkler Systems Contractor License

The Irrigation Sprinkler Systems Contractor License allows you to do the following work:

• Repair, install, and maintain sprinkler systems to distribute water for the purpose of irrigation
• Connections to potable water lines
• Installation of backflow prevention devices for non potable water
• Install hose bibs and service lines from source of supply, only permitted when:
  • They are an integral part of the sprinkler system and outside a building
• Dust and soil erosion control using:
  • Equipment
  • Materials
  • Fittings common to the industry

You may be required to obtain a plumbing certification for the use of pumps to draw or boost the pressure from any source of water that is used on a residential sprinkler system or for irrigation on a farm.

How to Get the Irrigation Sprinkler Systems Contractor’s License in Washington?

1. 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
2. Complete and get a Washington Continuous Contractor Surety Bond for the required amount
3. Purchase a general liability insurance policy for the required amount
4. 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
5. 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
6. Expect a registration card from the Washington State Department of Labor & Industries after the application is processed
7. 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