Black Diamond Heating and Air Conditioning INC, C-4 Boiler, Hot Water Heating and Steam Fitting Contractor in Oakley, CA
Black Diamond Heating and Air Conditioning INC operating as a corporation holds an active California contractor license (CSLB #931418), valid through Apr 30, 2027. First issued in 2009, the license has been on the CSLB roster for 17 years. It carries 4 CSLB classifications: C-4 Boiler, Hot Water Heating and Steam Fitting Contractor, C-20 HVAC Contractor, C-38 Refrigeration Contractor, and C-43 Sheet Metal Contractor. Records show an active surety bond on file with American Contractors Indemnity Company and a previously-filed workers' compensation policy with Markel Insurance Company that is no longer active. The business is based in Oakley, in Contra Costa County, California.
- License Number
- 931418
- Issued
- Apr 16, 2009
- Status
- CLEAR
- Expires
- Apr 30, 2027
- Entity
- Corporation
- Surety
- American Contractors Indemnity Company
- Bond Number
- 100067974
- Effective
- Jan 1, 2023
- Status
- Active
- Coverage
- Workers' Compensation Insurance
- Carrier
- Markel Insurance Company
- Policy Number
- MCW00639315
- Effective
- Jul 15, 2025
- Expires
- Jul 15, 2026
This contractor has a compliance issue in its public CSLB record:
- No active workers' comp on file
An automated summary of public CSLB data, not a credit score, rating, or endorsement. How we determine this
Is Black Diamond Heating and Air Conditioning INC licensed in California?
Yes. Black Diamond Heating and Air Conditioning INC holds California Contractors State License Board license number 931418, which is active and in good standing. The license was first issued on April 16, 2009. It is valid through April 30, 2027.
What does Black Diamond Heating and Air Conditioning INC specialize in?
Black Diamond Heating and Air Conditioning INC is licensed for 4 CSLB classifications: C-4 Boiler, Hot Water Heating and Steam Fitting Contractor, C-20 HVAC Contractor, C-38 Refrigeration Contractor, and C-43 Sheet Metal Contractor.
Where is Black Diamond Heating and Air Conditioning INC headquartered?
Black Diamond Heating and Air Conditioning INC is headquartered at 2063 Main St #425, Oakley, CA 94561, in Contra Costa County, California.
Does Black Diamond Heating and Air Conditioning INC have an active surety bond on file with CSLB?
Yes. Black Diamond Heating and Air Conditioning INC has an active California contractor surety bond filed with American Contractors Indemnity Company.
Does Black Diamond Heating and Air Conditioning INC carry workers' compensation coverage?
Black Diamond Heating and Air Conditioning INC has a previously-filed workers' compensation policy with Markel Insurance Company that is no longer active.
How do I verify Black Diamond Heating and Air Conditioning INC's contractor license?
You can verify Black Diamond Heating and Air Conditioning INC's license directly with the California Contractors State License Board at https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=931418.
- License issuedApr 16, 2009
- Bond activeJan 1, 2023
- WC coverage startsJul 15, 2025
- WC expiredJul 15, 2026
- License expiresApr 30, 2027
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