North Seattle plumbing / guide 10
Washington's plumbing contractor license and an individual plumber's certification answer different questions. Collect the exact identifiers relevant to the proposed work and verify them separately.
Call a plumber877-702-1610
Credential status can change. A saved screenshot or old invoice is background, not a substitute for the current L&I record at the time of authorization.
Search the entity that will contract and receive payment. Then search the person presented as responsible, including the classification and status shown by the state.
If a different company, professional, or scope appears after a transfer or change order, repeat the verification before approving the change.
What to observe now
Keep the notes factual. A visible clue can direct an inspection without proving what is hidden.
Use the name printed on the proposal rather than a shortened advertising label.
Review the current state record and the bond and insurance details it displays.
Compare name, number, classification, and status with the person responsible.
Ask the business to explain how the verified individual relates to this work.
Recheck whenever the contracting entity or responsible professional changes.
Responsibility
Closeout record
Save the lookup date and result with the estimate, permit, invoice, and warranty. Do not treat registration as a promise of quality, timing, or outcome.
Current primary sources
Public procedures and status can change. Use the source that owns the decision.