Duff Mechanical Services
Verified against CSLB on · View on CSLB
License details
- License number
- 1109379
- Status
- Active
- Classifications
- C-20 · Warm-Air Heating, Ventilating and Air-Conditioning
- Contractor bond
- $25,000
- Workers' comp
- Covered
- License term on file
- August 28, 2023 – August 31, 2027
Business
- (951) 476 9510 (CSLB public record)
- 53815 ROBIN LN, Aguanga, CA 92536Riverside County
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Frequently asked questions
Is Duff Mechanical Services licensed in California?
Yes. Duff Mechanical Services holds an active California state contractor license (CSLB #1109379), verified against the CSLB public record on June 17, 2026.
What is Duff Mechanical Services's CSLB license number?
Duff Mechanical Services's California contractor license number is 1109379. You can verify it directly on the CSLB website: https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=1109379
What kind of work is Duff Mechanical Services licensed for?
Duff Mechanical Services is classified under Warm-Air Heating, Ventilating and Air-Conditioning (C-20) by the CSLB.
How do I verify Duff Mechanical Services's license myself?
Look up license #1109379 with the CSLB "Check a License" tool at https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=1109379. This page reflects the CSLB public record as of June 17, 2026.
See an error in this record? Report incorrect information. Status reflects CSLB data as of the date shown above.