Mainstream Mechanical CORP
Heating/Vent/Air-Conditioning and Refrig (HVAC/R) · Edmonds, WA · License #MAINSM*945JF
Active
State-verifiedWhat does verified mean?
- State-verified — Checked against WA L&I records, updated daily.
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License facts
Mainstream Mechanical CORP is one of 9 Heating/Vent/Air-Conditioning and Refrig (HVAC/R) contractors registered in Edmonds, registered with WA L&I since 2006.
- License type
- CONSTRUCTION CONTRACTOR
- Effective date
- Apr 6, 2006
- Expiration date
- Apr 24, 2028
- UBI
- 602574360
- Business type
- Corporation
- Phone
- (425) 778-4315
- Location
- Edmonds, WA 98026
Source: WA L&I contractor registration — verified Aug 12, 2026. Applies to every row above.
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Claim this free listingBond & insurance on file
| Bond firm | Amount | Effective | Expiration |
|---|---|---|---|
| Lexon Ins Co | $15,000 | Apr 24, 2026 | Continuous — until canceled |
| Lexon Ins Co | $6,000 | Mar 10, 2012 | Apr 24, 2026 |
| Insurance company | Amount | Agency | Effective | Expiration |
|---|---|---|---|---|
| Farmers Ins Exchange | $2,000,000 | STEVEN & AARON ZWEIFACH AGENCY | Apr 10, 2021 | Apr 10, 2027 |
What the bond and insurance requirements mean for homeowners
A $15,000 surety bond, filed with the Department of Labor & Industries, is a condition of registration for specialty contractors in Washington (general contractors file $30,000). This contractor's current filing shows a $15,000 bond.
The bond is a limited fund a homeowner (or subcontractor or supplier) can make a claim against, through the courts, if a registered contractor fails to meet its obligations on a job. Contractors must also keep general liability insurance on file — at least $50,000 in property damage and $200,000 in public liability coverage, or a $250,000 combined single limit — which covers damage the contractor causes, not workmanship disputes. The rows above are the bond and insurance filings L&I publishes for this registration; whether a specific filing applies to a specific project depends on its dates and terms.
Principals
| Name | Start date |
|---|---|
| Clifford S Shoemaker | Apr 6, 2006 |
| Caralyn Keenan | Apr 6, 2006 |
| Clifford S Shoemaker | Apr 15, 2010 |
What is a Heating/Vent/Air-Conditioning and Refrig (HVAC/R) contractor licensed to do in Washington?
An HVAC/R specialty contractor is registered with WA L&I to install and service heating, ventilation, air-conditioning, and refrigeration systems. Electrical and mechanical work within HVAC systems may also require trade licenses administered separately by the state. Washington requires a $15,000 surety bond and general liability insurance for this registration. Washington currently lists 9 Heating/Vent/Air-Conditioning and Refrig (HVAC/R) contractors registered in Edmonds.
Other Heating/Vent/Air-Conditioning and Refrig (HVAC/R) contractors in Edmonds, WA
Air Treatment
Heating/Vent/Air-Conditioning And Refrig (HVAC/R) · Edmonds, WA
License #AIRTR**991Q8
Bidarca LLC
Heating/Vent/Air-Conditioning And Refrig (HVAC/R) · Edmonds, WA
License #BIDARL*806RZ · $15,000 bond
Matuska Heating Services INC
Heating/Vent/Air-Conditioning And Refrig (HVAC/R) · Edmonds, WA
License #MATUSHS012KK
Sig Mechanical LLC
Heating/Vent/Air-Conditioning And Refrig (HVAC/R) · Edmonds, WA
License #SIGMEML745CJ · $15,000 bond
Browse the directory
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Built from Washington State L&I public records, updated Aug 12, 2026. No star ratings or reviews — verification only.