Henthorn Plumbing, C-36 Plumbing Contractor in Redwood City, CA
Henthorn Plumbing operating as a sole owner holds California contractor license #994835, which is currently expired (lapsed Jul 31, 2026) and not valid to contract until it is renewed. First issued in 2014, the license has been on the CSLB roster for 12 years. It carries a single CSLB classification: C-36 — Plumbing Contractor. Records show an active surety bond on file with Atlantic Specialty Insurance Company and a previously-filed workers' compensation policy with Security National Insurance Company that is no longer active. The business is based in Redwood City, in San Mateo County, California.
- License Number
- 994835
- Issued
- Jul 19, 2014
- Status
- CLEAR
- Expires
- Jul 31, 2026
- Entity
- Sole Owner
- Surety
- Atlantic Specialty Insurance Company
- Bond Number
- 800212889
- Effective
- Nov 21, 2025
- Status
- Active
- Coverage
- Workers' Compensation Insurance
- Carrier
- Security National Insurance Company
- Policy Number
- SWC1560918
- Effective
- May 15, 2025
- Expires
- May 15, 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 Henthorn Plumbing licensed in California?
Henthorn Plumbing previously held California Contractors State License Board license number 994835, but the license expired on July 31, 2026 and is not currently valid. It was first issued on July 19, 2014.
What does Henthorn Plumbing specialize in?
Henthorn Plumbing is licensed for one CSLB classification: C-36 Plumbing Contractor.
Where is Henthorn Plumbing headquartered?
Henthorn Plumbing is headquartered at P O Box 610086, Redwood City, CA 94061, in San Mateo County, California.
Does Henthorn Plumbing have an active surety bond on file with CSLB?
Yes. Henthorn Plumbing has an active California contractor surety bond filed with Atlantic Specialty Insurance Company.
Does Henthorn Plumbing carry workers' compensation coverage?
Henthorn Plumbing has a previously-filed workers' compensation policy with Security National Insurance Company that is no longer active.
How do I verify Henthorn Plumbing's contractor license?
You can verify Henthorn Plumbing's license directly with the California Contractors State License Board at https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=994835.
- License issuedJul 19, 2014
- WC coverage startsMay 15, 2025
- Bond activeNov 21, 2025
- WC expiredMay 15, 2026
- License expiredJul 31, 2026
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