Washington contractor
GRASS MASTER
Registered in Washington for 32 years
- License number
- GRASSM*066DD
- UBI
- 601517336
- Trade
- Landscaping(all landscaping contractors in Washington)
- L&I license type and specialty
- CONSTRUCTION CONTRACTOR · LANDSCAPING
- City
- WOODINVILLE, WA(all contractors in Woodinville)
- Phone
- (425) 867-1117
Current verification
- Found: Active Washington contractor registration
- Found: Current bond record found
- Found: Current liability insurance record found
- Found: No Attorney General complaint records found
From the state records below; each section shows its source and when it was last synced.
Registration
- Status
- ACTIVE
- Effective date
- March 4, 1994
- Expiration date
- May 16, 2027
Source: L&I Contractor License Data - General, Washington State Department of Labor & Industries. Last synced October 7, 2026.
Bond
Current bond
- Bond company
- American States Insurance Co
- Bond number
- 32S223370
- Amount
- $15,000
- Effective date
- July 1, 2024
- Expiration date
- Until canceled
Bond history
- Bond company
- American States Insurance Co
- Bond number
- 32S223370
- Amount
- $6,000
- Effective date
- July 1, 2024
- Expiration date
- May 16, 2025
- Bond company
- American States Insurance Co
- Bond number
- EX907793
- Amount
- $6,000
- Effective date
- February 15, 2002
- Expiration date
- May 16, 2025
Source: L&I Contractor License Data - Bond, Washington State Department of Labor & Industries. Last synced October 9, 2026.
Liability insurance
Current policy
- Carrier
- ALLMERICA FINANCIAL BENEFIT IN
- Policy number
- Z22D627894
- Coverage amount
- $1,000,000
- Effective date
- July 1, 2026
- Expiration date
- July 1, 2027
L&I publishes only the policy currently on file. Earlier policies are kept from our own nightly syncs, which began October 6, 2026.
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.
- TREWIN, CHRISTOPHERSince January 1, 1980
- TREWIN, CHRISTOPHER HOODSince March 4, 1994
- CYSEWSKI, NICOLE CHRISTINESince May 16, 2025
- DOTSON, ANTHONY TJanuary 1, 1980 to June 2, 2006
- TREWIN, SHARON MARYJanuary 1, 1980 to May 16, 2025
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: GRASS MASTER in WOODINVILLE. Complaints filed under another name or city are not included.
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 GRASSM*066DD).