Moss Bay Plumbing Limited
Plumbing Specialty · Renton, WA · License #MOSSBPL000OO
Registration expired per WA L&I as of Mar 15, 2023.
Moss Bay Plumbing Limited is one of 21 Plumbing Specialty contractors registered in Renton, registered with WA L&I since 2000. Registered longer than roughly 75% of Plumbing Specialty contractors in Renton. Principals on record since 1980.
How confident can you be in Moss Bay Plumbing Limited?
Are they licensed, bonded, and insured?
Registration expired per WA L&I as of Mar 15, 2023.
Are they who they say they are?
Not yet verified — Moss Bay Plumbing Limited 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 Renton.
Do they have jobs on record?
Not yet measured — Moss Bay Plumbing Limited 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
- Sep 20, 2000
- Expiration date
- Mar 15, 2023
- Suspend date
- Jun 22, 2022
- UBI
- 602049480
- Business type
- Corporation
- Phone
- (425) 868-8446
- Location
- Renton, WA 98057
Source: WA L&I contractor registration — checked Nov 10, 2026. Applies to every row above.
Registration lapsed Mar 2023 per WA L&I records.
Is this your business? Claim it free to verify ownership — takes about two minutes.
Claim this free listingBond & insurance on file
What the bond and insurance requirements mean for homeowners
Registration as a specialty contractor in Washington requires a $15,000 surety bond on file with the Department of Labor & Industries; the general contractor requirement is $30,000.
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.
Principals
| Name | Start date |
|---|---|
| Brian John Knapik | Jan 1, 1980 |
| Maxine Bielby Knapik | Jan 1, 1980 |
| Andrew Brian Knapik | Apr 11, 2006 |
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. A $15,000 surety bond and general liability insurance, filed with WA L&I, are required for this registration. Washington currently lists 21 Plumbing Specialty contractors registered in Renton.
Looking for reviews of Moss Bay Plumbing Limited?
Subser doesn't have reviews or star ratings. This page shows Moss Bay Plumbing Limited's WA L&I record — registration status, bond and liability coverage, and principals on file — plus any endorsements from other licensed contractors.
Own Moss Bay Plumbing Limited? Claim the listing free. Worked with Moss Bay Plumbing Limited? Endorse them from your own listing.
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Built from Washington State L&I public records, updated Nov 10, 2026. Subser doesn't do star ratings or reviews — just verified records.