N P M Plumbing & Mech INC
Boiler/Steam Fit/Proc Piping · Seattle, WA · License #NPMPLM*033RZ
Registration expired per WA L&I as of Nov 29, 2023.
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Are they licensed, bonded, and insured?
Registration expired per WA L&I as of Nov 29, 2023.
Are they who they say they are?
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License facts
N P M Plumbing & Mech INC is one of 4 Boiler/Steam Fit/Proc Piping contractors registered in Seattle, registered with WA L&I since 1997. Principals on record since 2019.
- License type
- CONSTRUCTION CONTRACTOR
- Effective date
- Dec 9, 1997
- Expiration date
- Nov 29, 2023
- UBI
- 601836256
- Business type
- Corporation
- Phone
- (206) 714-7295
- Location
- Seattle, WA 98155
Source: WA L&I contractor registration — checked Aug 15, 2026. Applies to every row above.
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Claim this free listingBond & insurance on file
What the bond and insurance requirements mean for homeowners
To register as a specialty contractor in Washington, a business must file a $15,000 surety bond with the Department of Labor & Industries; general contractors file $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 |
|---|---|
| Niven Peter Marquis | Apr 26, 2019 |
What is a Boiler/Steam Fit/Proc Piping contractor licensed to do in Washington?
Boiler and steam fitting contractors install and repair boilers, steam and hydronic heating systems, and process piping. Typical projects include boiler replacement, radiator and piping repair, and industrial process pipe installation. As a condition of registration, contractors in this category file a $15,000 surety bond and proof of general liability insurance with WA L&I. Washington currently lists 4 Boiler/Steam Fit/Proc Piping contractors registered in Seattle.
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Built from Washington State L&I public records, updated Aug 15, 2026. Subser doesn't do star ratings or reviews — just verified records.