Duff Mechanical Services, C-20 HVAC Contractor in Aguanga, CA
Duff Mechanical Services operating as a sole owner holds an active California contractor license (CSLB #1109379), valid through Aug 31, 2027. First issued in 2023, the license has been on the CSLB roster for 3 years. It carries a single CSLB classification: C-20 — HVAC Contractor. Records show an active surety bond on file with North River Insurance Company (the) and active workers' compensation coverage from Clear Spring Property and Casualty Company. The business is based in Aguanga, in Riverside County, California.
- License Number
- 1109379
- Issued
- Aug 28, 2023
- Status
- CLEAR
- Expires
- Aug 31, 2027
- Entity
- Sole Owner
- Surety
- North River Insurance Company (the)
- Bond Number
- 04CF645918
- Effective
- Aug 15, 2025
- Status
- Active
- Coverage
- Workers' Compensation Insurance
- Carrier
- Clear Spring Property and Casualty Company
- Policy Number
- CWC03597800
- Effective
- Sep 30, 2025
- Expires
- Sep 9, 2026
This contractor is verified, with no adverse conditions in the current CSLB record.
An automated summary of public CSLB data, not a credit score, rating, or endorsement. How we determine this
Is Duff Mechanical Services licensed in California?
Yes. Duff Mechanical Services holds California Contractors State License Board license number 1109379, which is active and in good standing. The license was first issued on August 28, 2023. It is valid through August 31, 2027.
What does Duff Mechanical Services specialize in?
Duff Mechanical Services is licensed for one CSLB classification: C-20 HVAC Contractor.
Where is Duff Mechanical Services headquartered?
Duff Mechanical Services is headquartered at 53815 Robin Ln, Aguanga, CA 92536, in Riverside County, California.
Does Duff Mechanical Services have an active surety bond on file with CSLB?
Yes. Duff Mechanical Services has an active California contractor surety bond filed with North River Insurance Company (the).
Does Duff Mechanical Services carry workers' compensation coverage?
Yes. Duff Mechanical Services carries active workers' compensation coverage through Clear Spring Property and Casualty Company.
How do I verify Duff Mechanical Services's contractor license?
You can verify Duff Mechanical Services's license directly with the California Contractors State License Board at https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=1109379.
- License issuedAug 28, 2023
- Bond activeAug 15, 2025
- WC coverage startsSep 30, 2025
- WC expiresSep 9, 2026
- License expiresAug 31, 2027
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