William Leonard LLC
Plumbing Specialty · Seattle, WA · License #WILLILL951B1
Re-licensed per WA L&I — this registration was replaced.
WA L&I status: RE-LICENSED
William Leonard LLC is one of 61 Plumbing Specialty contractors registered in Seattle, registered with WA L&I since 2005. Registered longer than roughly 75% of Plumbing Specialty contractors in Seattle.
How confident can you be in William Leonard LLC?
Are they licensed, bonded, and insured?
Registration not currently active per WA L&I.
Are they who they say they are?
Not yet verified — William Leonard LLC hasn't claimed this listing. Own this business? Claim it free.
Do other pros stand behind them?
No endorsements yet from other licensed contractors in Seattle.
Do they have jobs on record?
Not yet measured — William Leonard LLC hasn't run jobs through Subser. Performance data comes from real jobs, not reviews.
Subser doesn't do star ratings or reviews — just verified records. What do these mean?
License facts
- License type
- CONSTRUCTION CONTRACTOR
- Effective date
- Jan 21, 2005
- Expiration date
- Jan 21, 2021
- UBI
- 602455125
- Business type
- Limited Liability Company
- Phone
- (206) 850-7524
- Location
- Seattle, WA 98103
Source: WA L&I contractor registration — checked Sep 29, 2026. Applies to every row above.
Is this your business? Claim it free to verify ownership — takes about two minutes.
Claim this free listingBond & insurance on file
| Bond firm | Amount | Effective | Expiration |
|---|---|---|---|
| RLI Ins Co | $6,000 | Jan 1, 2005 | Canceled Jan 1, 2025 |
What the bond and insurance requirements mean for homeowners
Washington requires specialty contractors to file a $15,000 surety bond with the Department of Labor & Industries as a condition of registration ($30,000 for general contractors).
The bond is a limited fund a homeowner (or subcontractor or supplier) can make a claim against, through the courts, if a registered contractor fails to meet its obligations on a job. Contractors must also keep general liability insurance on file — at least $50,000 in property damage and $200,000 in public liability coverage, or a $250,000 combined single limit — which covers damage the contractor causes, not workmanship disputes. The rows above are the bond and insurance filings L&I publishes for this registration; whether a specific filing applies to a specific project depends on its dates and terms.
What is a Plumbing Specialty contractor licensed to do in Washington?
A plumbing specialty contractor registration with WA L&I covers plumbing installation and repair work. Individual plumbers in Washington are additionally certified through a separate state plumber-certification program; the contractor registration shown here is the business-level registration. The registration requires a $15,000 surety bond and general liability insurance on file with WA L&I. Washington currently lists 61 Plumbing Specialty contractors registered in Seattle.
Looking for reviews of William Leonard LLC?
Subser doesn't have reviews or star ratings. This page shows William Leonard LLC's WA L&I record — registration status, bond and liability coverage, and principals on file — plus any endorsements from other licensed contractors.
Own William Leonard LLC? Claim the listing free. Worked with William Leonard LLC? Endorse them from your own listing.
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Browse the directory
Built from Washington State L&I public records, updated Sep 29, 2026. Subser doesn't do star ratings or reviews — just verified records.