Washington Contractor License Lookup

About Washington contractor licensing

Washington uses a strong statewide contractor registration system through Labor & Industries, and homeowners get a very practical verification tool in L&I Verify. The state also requires bond and insurance for registered contractors, which makes Washington's public records especially useful when you want to screen beyond a simple yes-or-no status check.

How licensing works in Washington

Washington registers contractors statewide through L&I rather than using a local-only model. The system ties registration to bond and insurance requirements, which gives homeowners meaningful consumer-protection data in one place. Because the threshold is low, many ordinary residential jobs should involve a registered contractor. Homeowners should still verify separate trade credentials where necessary, but the L&I contractor record is the central first step for most residential hiring.

What to verify in Washington

Use the L&I Verify tool and search by business name, UBI number, or contractor registration number. Confirm the registration is active and review bond and insurance status, because Washington makes those elements visible to the public. Match the legal entity on the record to the company on your contract and permit paperwork. If the project includes specialty trades, use the same state resources to verify those credentials separately instead of assuming the prime contractor record covers all work.

State-specific tips

• › Read the bond and insurance details in L&I Verify; Washington gives homeowners unusually useful screening information there.
• › If the contract is over $1,000, ask for the registration number before discussing scheduling or deposits.
• › For Seattle-area jobs, local permits still matter, but the statewide L&I contractor record should be your first check.
• › If the contractor gives only a UBI number, use it to pull the exact L&I record and compare the legal entity carefully.
• › On roofing and exterior-envelope work, verify the registration before materials arrive because weather-driven scheduling can pressure homeowners into rushing.