Interlock Plumbing, C-36 Plumbing Contractor in Antioch, CA
Interlock Plumbing operating as a corporation holds an active California contractor license (CSLB #1149890), valid through Feb 29, 2028. It carries a single CSLB classification: C-36 — Plumbing Contractor. Records show an active surety bond on file with American Contractors Indemnity Company and active workers' compensation coverage from National Specialty Insurance Company. The business is based in Antioch, in Contra Costa County, California.
- License Number
- 1149890
- Issued
- Feb 3, 2026
- Status
- CLEAR
- Expires
- Feb 29, 2028
- Entity
- Corporation
- Surety
- American Contractors Indemnity Company
- Bond Number
- 101031911
- Effective
- Jan 23, 2026
- Status
- Active
- Coverage
- Workers' Compensation Insurance
- Carrier
- National Specialty Insurance Company
- Policy Number
- NXT43HKKYY00WC
- Effective
- Jan 11, 2026
- Expires
- Jan 11, 2027
Recently licensed: the CSLB license is active and in good standing, issued within the last 2 years.
An automated summary of public CSLB data, not a credit score, rating, or endorsement. How we determine this
Is Interlock Plumbing licensed in California?
Yes. Interlock Plumbing holds California Contractors State License Board license number 1149890, which is active and in good standing. The license was first issued on February 3, 2026. It is valid through February 29, 2028.
What does Interlock Plumbing specialize in?
Interlock Plumbing is licensed for one CSLB classification: C-36 Plumbing Contractor.
Where is Interlock Plumbing headquartered?
Interlock Plumbing is headquartered at 4045 Rockford Dr, Antioch, CA 94509, in Contra Costa County, California.
Does Interlock Plumbing have an active surety bond on file with CSLB?
Yes. Interlock Plumbing has an active California contractor surety bond filed with American Contractors Indemnity Company.
Does Interlock Plumbing carry workers' compensation coverage?
Yes. Interlock Plumbing carries active workers' compensation coverage through National Specialty Insurance Company.
How do I verify Interlock Plumbing's contractor license?
You can verify Interlock Plumbing's license directly with the California Contractors State License Board at https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=1149890.
- WC coverage startsJan 11, 2026
- Bond activeJan 23, 2026
- License issuedFeb 3, 2026
- WC expiresJan 11, 2027
- License expiresFeb 29, 2028
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