Lake Washington Plumbing LLC
Plumbing · Shoreline, WA · License #LAKEWWP811RR
Registration expired per WA L&I as of Dec 19, 2021.
Lake Washington Plumbing LLC is one of 15 Plumbing contractors registered in Shoreline, registered with WA L&I since 2019. Principals on record since 2019.
How confident can you be in Lake Washington Plumbing LLC?
Are they licensed, bonded, and insured?
Registration expired per WA L&I as of Dec 19, 2021.
Are they who they say they are?
Not yet verified — Lake Washington Plumbing 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 Shoreline.
Do they have jobs on record?
Not yet measured — Lake Washington Plumbing 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.
License facts
- License type
- CONSTRUCTION CONTRACTOR
- Effective date
- Dec 19, 2019
- Expiration date
- Dec 19, 2021
- Suspend date
- Apr 1, 2021
- UBI
- 604408989
- Business type
- Limited Liability Company
- Phone
- (206) 718-7708
- Location
- Shoreline, WA 98155
Source: WA L&I contractor registration — checked Aug 18, 2026. Applies to every row above.
Registration lapsed Dec 2021 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
A $15,000 surety bond, filed with the Department of Labor & Industries, is a condition of registration for specialty contractors in Washington (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 |
|---|---|
| Ronald Boyce Prohaska | Dec 19, 2019 |
| Ruth Marie Prohaska | Dec 19, 2019 |
What is a Plumbing 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. Washington requires a $15,000 surety bond and general liability insurance for this registration. Washington currently lists 15 Plumbing contractors registered in Shoreline.
Looking for reviews of Lake Washington Plumbing LLC?
Subser doesn't have reviews or star ratings. This page shows Lake Washington Plumbing LLC's WA L&I record — registration status, bond and liability coverage, and principals on file — plus any endorsements from other licensed contractors.
Own Lake Washington Plumbing LLC? Claim the listing free. Worked with Lake Washington Plumbing LLC? Endorse them from your own listing.
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Browse the directory
Built from Washington State L&I public records, updated Aug 18, 2026. Subser doesn't do star ratings or reviews — just verified records.