Registered Washington contractor, based in PORTLAND, OR
D & D MECHANICAL INC
Registered in Washington for 21 years
- License number
- DDMECDM954MK
- UBI
- 602520152
- Trade
- General contractor(all general contractor contractors in Washington)
- L&I license type and specialty
- CONSTRUCTION CONTRACTOR · GENERAL
- Business address
- PORTLAND, OR
- Phone
- (503) 335-7699
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
- 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 12, 2005
- Expiration date
- January 27, 2028
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, 602520152. 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.
- D & D MECHANICAL INCACTIVE
License DDMECDM883O7 · ELECTRICAL CONTRACTOR · September 27, 2012 to November 5, 2026
Source: L&I Contractor License Data - General, Washington State Department of Labor & Industries. Last synced October 7, 2026.
Bond
Current bond
- Bond company
- Contractors Bonding & Insurance Co
- Bond number
- PD6733
- Amount
- $30,000
- Effective date
- July 17, 2024
- Expiration date
- Until canceled
Bond history
- Bond company
- Contractors Bonding & Insurance Co
- Bond number
- PD6733
- Amount
- $12,000
- Effective date
- July 24, 2005
- Expiration date
- July 17, 2024
Source: L&I Contractor License Data - Bond, Washington State Department of Labor & Industries. Last synced October 9, 2026.
Liability insurance
Current policy
- Carrier
- Twin City Fire Ins Co
- Policy number
- 52SBAAD9470
- Coverage amount
- $2,000,000
- Effective date
- November 25, 2025
- Expiration date
- November 25, 2026
Insurance history
- Carrier
- State Farm Fire & Cas Co
- Policy number
- 97-G6-7806-7
- Coverage amount
- $2,000,000
- Effective date
- January 1, 2026
- Expiration date
- January 1, 2027
- Cancellation date
- January 21, 2026
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.
- ALG SERVICE CO LLCSince July 12, 2005
- DALE, DONOVAN PENNSince July 12, 2005
- DILGARDE, BOYAN LLOYDSince July 12, 2005
- DILGARDE, DORIS LISELOTTESince January 27, 2012
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: D D MECHANICAL in PORTLAND. Complaints filed under another name or city are not included.
One other registered contractor shares this business name and city: D & D MECHANICAL INC (DDMECDM883O7, 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 DDMECDM954MK).