Mainline Plumbing, C-36 Plumbing Contractor in Lomita, CA
Mainline Plumbing operating as a sole owner holds an active California contractor license (CSLB #901735), valid through Aug 31, 2027. First issued in 2007, the license has been on the CSLB roster for 19 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 active workers' compensation coverage from Transportation Insurance Company. The business is based in Lomita, in Los Angeles County, California.
- License Number
- 901735
- Issued
- Aug 8, 2007
- Status
- CLEAR
- Expires
- Aug 31, 2027
- Entity
- Sole Owner
- Surety
- Atlantic Specialty Insurance Company
- Bond Number
- 800232752
- Effective
- Apr 3, 2026
- Status
- Active
- Coverage
- Workers' Compensation Insurance
- Carrier
- Transportation Insurance Company
- Policy Number
- 7038734497
- Effective
- Feb 22, 2026
- Expires
- Feb 22, 2027
This contractor is verified, with no adverse conditions in the current CSLB record.
An automated summary of public CSLB data, not a credit score, rating, or endorsement. How we determine this
Is Mainline Plumbing licensed in California?
Yes. Mainline Plumbing holds California Contractors State License Board license number 901735, which is active and in good standing. The license was first issued on August 8, 2007. It is valid through August 31, 2027.
What does Mainline Plumbing specialize in?
Mainline Plumbing is licensed for one CSLB classification: C-36 Plumbing Contractor.
Where is Mainline Plumbing headquartered?
Mainline Plumbing is headquartered at 2319 246th Place, Lomita, CA 90717, in Los Angeles County, California.
Does Mainline Plumbing have an active surety bond on file with CSLB?
Yes. Mainline Plumbing has an active California contractor surety bond filed with Atlantic Specialty Insurance Company.
Does Mainline Plumbing carry workers' compensation coverage?
Yes. Mainline Plumbing carries active workers' compensation coverage through Transportation Insurance Company.
How do I verify Mainline Plumbing's contractor license?
You can verify Mainline Plumbing's license directly with the California Contractors State License Board at https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=901735.
- License issuedAug 8, 2007
- WC coverage startsFeb 22, 2026
- Bond activeApr 3, 2026
- WC expiresFeb 22, 2027
- License expiresAug 31, 2027
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