Diamondback HVAC LLC
Heating/Vent/Air-Conditioning and Refrig (HVAC/R) · Olympia, WA · License #DIAMOHL767P8
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State-verifiedWhat does verified mean?
- State-verified — Checked against WA L&I records, updated daily.
- Owner-verified — The business claimed this listing and verified ownership — free. Claim this listing
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License facts
Diamondback HVAC LLC is one of 16 Heating/Vent/Air-Conditioning and Refrig (HVAC/R) contractors registered in Olympia, registered with WA L&I since 2024. Registered longer than roughly 25% of Heating/Vent/Air-Conditioning and Refrig (HVAC/R) contractors in Olympia. Current filings: $15,000 surety bond (continuous) and $1,000,000 liability coverage through Oct 23, 2026.
- License type
- CONSTRUCTION CONTRACTOR
- Effective date
- Oct 28, 2024
- Expiration date
- Oct 28, 2026
- UBI
- 605603880
- Business type
- Limited Liability Company
- Phone
- (602) 679-4732
- Location
- Olympia, WA 98513
Source: WA L&I contractor registration — verified Aug 14, 2026. Applies to every row above.
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Claim this free listingBond & insurance on file
| Bond firm | Amount | Effective | Expiration |
|---|---|---|---|
| Harco National Insurance Co | $15,000 | Oct 23, 2024 | Continuous — until canceled |
| Insurance company | Amount | Agency | Effective | Expiration |
|---|---|---|---|---|
| Midvale Indemnity Comp | $1,000,000 | SEAN O SUNDWALL AGENCY AFMIC | Oct 23, 2024 | Oct 23, 2026 |
What the bond and insurance requirements mean for homeowners
Registration as a specialty contractor in Washington requires a $15,000 surety bond on file with the Department of Labor & Industries; the general contractor requirement is $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 |
|---|---|
| Christophergloria Castro | Oct 28, 2024 |
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. A $15,000 surety bond and general liability insurance, filed with WA L&I, are required for this registration. Washington currently lists 16 Heating/Vent/Air-Conditioning and Refrig (HVAC/R) contractors registered in Olympia.
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Dad's Heating & Air LLC
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License #DADSHHA748LH · $15,000 bond
Dryer Duct Plus LLC
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License #DRYERDP754JG · $15,000 bond
Master Mechanical LLC
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Pacific Air Heating & A/C INC
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License #PACIFAH908LP · $15,000 bond
Rainier Air Services
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Browse the directory
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Built from Washington State L&I public records, updated Aug 14, 2026. No star ratings or reviews — verification only.