Washington contractor
MAINSTREAM PLUMBING LLC
First registered in Washington on October 4, 2021
- License number
- MAINSPL798O7
- UBI
- 604451150
- Trade
- Electrical(all electrical contractors in Washington)
- L&I license type and specialty
- ELECTRICAL CONTRACTOR · GENERAL
- City
- ARLINGTON, WA(all contractors in Arlington)
- Phone
- (360) 588-2227
Current verification
- Found: No Attorney General complaint records found
- Review: Registration is not currently active
- Review: Registration appears to be expired
- Review: No current bond record located; L&I does not publish savings assignments
- Review: 6 other license records under the same UBI
From the state records below; each section shows its source and when it was last synced.
Registration
- Status
- INACTIVE
- Effective date
- October 4, 2021
- Expiration date
- October 4, 2023
Source: L&I Contractor License Data - General, Washington State Department of Labor & Industries. Last synced October 7, 2026.
Related licenses
6 other license numbers are registered under the same UBI, 604451150. A UBI identifies one business with the state; a business may hold more than one license, renew under a new number, or register a new license after an earlier one closed.
- DAPPER PLUMBINGACTIVE
License DAPPEP*770C2 · PLUMBING CONTRACTOR · March 13, 2023 to August 22, 2027
- DAPPER ELECTRICACTIVE
License DAPPEE*793PN · ELECTRICAL CONTRACTOR · October 4, 2021 to October 4, 2027
- DAPPER PLUMBINGEXPIRED
License DAPPEP*764MQ · PLUMBING CONTRACTOR · July 18, 2024 to July 18, 2026 · suspension date May 21, 2025
- DAPPER HEATING & AIREXPIRED
License DAPPEHA808RQ · CONSTRUCTION CONTRACTOR · January 12, 2021 to January 12, 2025
- DAPPER PLUMBINGOUT OF BUSINESS
License DAPPEP*807LC · CONSTRUCTION CONTRACTOR · June 3, 2020 to June 3, 2022 · suspension date May 21, 2022
- MAINSTREAM PLUMBING LLCOUT OF BUSINESS
License MAINSPL814K8 · CONSTRUCTION CONTRACTOR · May 28, 2019 to November 23, 2023
Source: L&I Contractor License Data - General, Washington State Department of Labor & Industries. Last synced October 7, 2026.
Bond
Current bond
No current bond record located in the state's bond dataset.
L&I also accepts an assignment of a savings account in place of a bond. The state does not publish those in its open data, so this page cannot show one; L&I's Verify a Contractor tool does.
Bond history
- Bond company
- American Contractors Indem CO
- Bond number
- 100603005
- Amount
- $4,000
- Effective date
- September 10, 2021
- Expiration date
- October 15, 2021
Source: L&I Contractor License Data - Bond, Washington State Department of Labor & Industries. Last synced October 9, 2026.
Liability insurance
Chapter 19.28 RCW, the electrical contractor licensing law, requires a bond and does not require liability insurance. L&I's insurance dataset has no policy on file for this contractor.
Source: L&I Contractor License Data - Insurance, Washington State Department of Labor & Industries. Last synced October 9, 2026.
People
Principals L&I lists for this license.
L&I does not publish principal records for contractors with INACTIVE status.
Source: L&I Contractor License - Principal Data, Washington State Department of Labor & Industries. Last synced October 9, 2026.
Attorney General complaints
No Attorney General complaint records found.
Matched on business name and city: MAINSTREAM PLUMBING in ARLINGTON. Complaints filed under another name or city are not included.
One other registered contractor shares this business name and city: MAINSTREAM PLUMBING LLC (MAINSPL814K8, OUT OF BUSINESS). Complaints are matched by business name and city, so any complaint records shown here also appear on those pages. The records do not say which of these contractors a complaint was about.
A complaint record does not establish that the business violated the law.
Source: Attorney General Consumer Complaints, Washington State Attorney General's Office. Last synced October 9, 2026.
Record history
Changes to this contractor's state records since we began tracking them. The state's current-status tools do not show these.
No changes recorded since our records began on October 6, 2026.
Sources
- L&I Contractor License Data - General, Washington State Department of Labor & Industries
- L&I Contractor License Data - Bond, Washington State Department of Labor & Industries
- L&I Contractor License Data - Insurance, Washington State Department of Labor & Industries
- L&I Contractor License - Principal Data, Washington State Department of Labor & Industries
- Attorney General Consumer Complaints, Washington State Attorney General's Office
Record last synced October 7, 2026.
Check this record against the state directly on L&I's Verify a Contractor page (search by license number MAINSPL798O7).