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William Leonard LLC

Registered with Washington L&I Active
WILLILL790P9 · Plumbing Contractor · renews February 2028

From the state register, October 17, 2026. Confirm on L&I, which also shows their bond and insurance.

(206) 850-7524Phone on their state registration Reviews on GoogleOpens Google Maps
Journey levelSpecialty on the register

Before you hire them

1Check the name on your estimate matches William Leonard LLC and registration WILLILL790P9.
2Ask whether the job needs a permit, and who pulls it.
3Get a written estimate first. No big cash deposits.
Ask this pro to call me

Free. Goes to one pro registered with Washington L&I.

Referral service, not a contractor. Privacy.

"Get a pro to call me" goes to William Leonard LLC if they can take it; if not, to one other registered plumber near Seattle.

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