Washington contractor
UNITED PLUMBING
First registered in Washington on December 6, 1986
- License number
- UNITEP*148RF
- UBI
- 600634873
- Trade
- Plumbing(all plumbing contractors in Washington)
- L&I license type and specialty
- CONSTRUCTION CONTRACTOR · PLUMBING
- City
- MONROE, WA(all contractors in Monroe)
- Phone
- (360) 794-5557
A newer license record under the same UBI is on file: UNITED PLUMBING, license UNITEP*763PB, EXPIRED, effective September 19, 2024. See Related licenses below.
Current verification
- Found: No Attorney General complaint records found
- Review: Registration is not currently active
- Review: Registration appears to be expired
- Review: 2 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
- EXPIRED
- Effective date
- December 6, 1986
- Expiration date
- January 8, 2022
Source: L&I Contractor License Data - General, Washington State Department of Labor & Industries. Last synced October 7, 2026.
Related licenses
2 other license numbers are registered under the same UBI, 600634873. 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.
- UNITED PLUMBINGEXPIRED
License UNITEP*763PB · PLUMBING CONTRACTOR · September 19, 2024 to September 19, 2026 · suspension date July 17, 2026
- UNITED PLUMBINGEXPIRED
License UNITEP*792RF · PLUMBING CONTRACTOR · January 12, 2022 to January 12, 2026 · suspension date September 27, 2024
Source: L&I Contractor License Data - General, Washington State Department of Labor & Industries. Last synced October 7, 2026.
Bond
L&I does not publish bond records for contractors with EXPIRED status.
Source: L&I Contractor License Data - Bond, Washington State Department of Labor & Industries. Last synced October 9, 2026.
Liability insurance
L&I does not publish liability insurance records for contractors with EXPIRED status.
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.
- SIEH, WILLIAM JSince December 6, 1986
- SIEH, ROXANNJanuary 1, 1980 to December 14, 2017
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: UNITED PLUMBING in MONROE. Complaints filed under another name or city are not included.
2 other registered contractors share this business name and city: UNITED PLUMBING (UNITEP*763PB, EXPIRED), UNITED PLUMBING (UNITEP*792RF, EXPIRED). 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 UNITEP*148RF).