Heat Transfer Systems Corporation
Heat Transfer Systems Corporation operating as a corporation is licensed in California under CSLB number 1149338. It carries a single CSLB classification: A — General Engineering Contractor. Records show an active surety bond on file with Nationwide Mutual Insurance Company and an exempt workers' compensation status (no employees on payroll). The business is based in Livermore, in Alameda County, California.
- License Number
- 1149338
- Issued
- Jan 22, 2026
- Status
- CLEAR
- Expires
- Jan 31, 2028
- Entity
- Corporation
- Surety
- Nationwide Mutual Insurance Company
- Bond Number
- 7901209733
- Effective
- Jan 9, 2026
- Status
- Active
- Coverage
- Exempt
- Carrier
- —
- Policy Number
- —
- Effective
- Oct 24, 2025
- Expires
- —
This contractor warrants a closer look before contracting:
- Workers' comp listed as exempt
- License issued less than 2 years ago
An automated summary of public CSLB data, not a credit score, rating, or endorsement. How we determine this
Is Heat Transfer Systems Corporation licensed in California?
Yes. Heat Transfer Systems Corporation holds California Contractors State License Board license number 1149338. The license was first issued on January 22, 2026. It is valid through January 31, 2028.
What does Heat Transfer Systems Corporation specialize in?
Heat Transfer Systems Corporation is licensed for one CSLB classification: A General Engineering Contractor.
Where is Heat Transfer Systems Corporation headquartered?
Heat Transfer Systems Corporation is headquartered at 239 Boeing Court, Livermore, CA 94551, in Alameda County, California.
Does Heat Transfer Systems Corporation have an active surety bond on file with CSLB?
Yes. Heat Transfer Systems Corporation has an active California contractor surety bond filed with Nationwide Mutual Insurance Company.
Does Heat Transfer Systems Corporation carry workers' compensation coverage?
Heat Transfer Systems Corporation reports an exempt workers' compensation status, meaning the business has no employees on payroll.
How do I verify Heat Transfer Systems Corporation's contractor license?
You can verify Heat Transfer Systems Corporation's license directly with the California Contractors State License Board at https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=1149338.
- WC coverage startsOct 24, 2025
- Bond activeJan 9, 2026
- License issuedJan 22, 2026
- License expiresJan 31, 2028
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