National Air Balance Company INC, C-61/D-62 Air and Water Balancing Contractor in Pleasanton, CA
National Air Balance Company INC operating as a corporation holds California contractor license #348633, which is currently expired (lapsed Sep 30, 2026) and not valid to contract until it is renewed. First issued in 1977, the license has been on the CSLB roster for 49 years. It carries a single CSLB classification: C-61/D-62 — Air and Water Balancing Contractor. Records show an active surety bond on file with Merchants Bonding Company (mutual) and a previously-filed workers' compensation policy with Sentinel Insurance Company LTD that is no longer active. The business is based in Pleasanton, in Alameda County, California.
- License Number
- 348633
- Issued
- Dec 1, 1977
- Status
- CLEAR
- Expires
- Sep 30, 2026
- Entity
- Corporation
- Surety
- Merchants Bonding Company (mutual)
- Bond Number
- CA708996
- Effective
- Jan 1, 2023
- Status
- Active
- Coverage
- Workers' Compensation Insurance
- Carrier
- Sentinel Insurance Company LTD
- Policy Number
- 57WEABK0ZN1
- Effective
- Oct 1, 2024
- Expires
- Oct 1, 2026
This contractor has a compliance issue in its public CSLB record:
- License expired
- 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 National Air Balance Company INC licensed in California?
National Air Balance Company INC previously held California Contractors State License Board license number 348633, but the license expired on September 30, 2026 and is not currently valid. It was first issued on December 1, 1977.
What does National Air Balance Company INC specialize in?
National Air Balance Company INC is licensed for one CSLB classification: C-61/D-62 Air and Water Balancing Contractor.
Where is National Air Balance Company INC headquartered?
National Air Balance Company INC is headquartered at 6701 Koll Center Parkway,suite 425, Pleasanton, CA 94566, in Alameda County, California.
Does National Air Balance Company INC have an active surety bond on file with CSLB?
Yes. National Air Balance Company INC has an active California contractor surety bond filed with Merchants Bonding Company (mutual).
Does National Air Balance Company INC carry workers' compensation coverage?
National Air Balance Company INC has a previously-filed workers' compensation policy with Sentinel Insurance Company LTD that is no longer active.
How do I verify National Air Balance Company INC's contractor license?
You can verify National Air Balance Company INC's license directly with the California Contractors State License Board at https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=348633.
- License issuedDec 1, 1977
- Bond activeJan 1, 2023
- WC coverage startsOct 1, 2024
- License expiredSep 30, 2026
- WC expiredOct 1, 2026
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