Washington contractor
NATIONAL SIGN CORPORATION
Registered in Washington for 29 years
- License number
- NATIOSC031M3
- UBI
- 578048524
- Trade
- Electrical(all electrical contractors in Washington)
- L&I license type and specialty
- ELECTRICAL CONTRACTOR · SIGN
- City
- SEATTLE, WA(all contractors in Seattle)
- Phone
- (206) 282-0700
Current verification
- Found: Active Washington contractor registration
- Found: Current bond record found
- Found: No Attorney General complaint records found
- Review: 1 other license record under the same UBI
From the state records below; each section shows its source and when it was last synced.
Registration
- Status
- ACTIVE
- Effective date
- July 23, 1997
- Expiration date
- July 23, 2027
Source: L&I Contractor License Data - General, Washington State Department of Labor & Industries. Last synced October 7, 2026.
Related licenses
One other license number is registered under the same UBI, 578048524. 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.
- NATIONAL SIGN CORPACTIVE
License NATIOSC166MS · CONSTRUCTION CONTRACTOR · July 10, 1984 to April 4, 2027
Source: L&I Contractor License Data - General, Washington State Department of Labor & Industries. Last synced October 7, 2026.
Bond
Current bond
- Bond company
- CBIC
- Bond number
- 628632
- Amount
- $4,000
- Effective date
- August 10, 1990
- Expiration date
- Until canceled
Source: L&I Contractor License Data - Bond, Washington State Department of Labor & Industries. Last synced October 9, 2026.
Liability insurance
Current policy
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.
- ZAMBERLIN, STEPHEN GSince January 1, 1980
- ZAMBERLIN, TIMOTHYSince January 1, 1980
- ZAMBERLIN, TIMOTHY DSince January 1, 1980
- ZAMBERLIN, COLLEENSince July 1, 2011
- ZAMBERLIN, TAKAKOSince July 1, 2011
- ZAMBERLIN, GEORGE SJanuary 1, 1980 to July 1, 2011
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: NATIONAL SIGN CORPORATION in SEATTLE. 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 NATIOSC031M3).