Washington contractor
KNOCKOUT PLUMBING & MECH LLC
First registered in Washington on April 25, 2019
- License number
- KNOCKPM817J2
- UBI
- 604427827
- Trade
- General contractor(all general contractor contractors in Washington)
- L&I license type and specialty
- CONSTRUCTION CONTRACTOR · GENERAL
- City
- SEATTLE, WA(all contractors in Seattle)
- Phone
- (206) 858-2211
A newer license record under the same UBI is on file: KNOCKOUT PLUMBING & MECH LLC, license KNOCKPM743K9, ACTIVE, effective June 2, 2026. 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
- April 25, 2019
- Expiration date
- April 25, 2023
- Suspension date
- April 12, 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, 604427827. 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.
License KNOCKPM743K9 · PLUMBING CONTRACTOR · June 2, 2026 to June 2, 2028
License KNOCKPM782DB · PLUMBING CONTRACTOR · March 25, 2022 to March 25, 2028
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.
- FORSTER, COLIN TRAVISSince April 22, 2019
- MILLER, ZACHARY STEPHENSince April 22, 2019
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: KNOCKOUT PLUMBING MECH in SEATTLE. Complaints filed under another name or city are not included.
2 other registered contractors share this business name and city: KNOCKOUT PLUMBING & MECH LLC (KNOCKPM743K9, ACTIVE), KNOCKOUT PLUMBING & MECH LLC (KNOCKPM782DB, ACTIVE). 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 KNOCKPM817J2).