Mainstream Plumbing, C-36 Plumbing Contractor in El Cajon, CA
Mainstream Plumbing operating as a sole owner holds an active California contractor license (CSLB #959182), valid through Mar 31, 2027. First issued in 2011, the license has been on the CSLB roster for 15 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 an exempt workers' compensation status (no employees on payroll). The business is based in El Cajon, in San Diego County, California.
- License Number
- 959182
- Issued
- Mar 24, 2011
- Status
- CLEAR
- Expires
- Mar 31, 2027
- Entity
- Sole Owner
- Surety
- Atlantic Specialty Insurance Company
- Bond Number
- 800233636
- Effective
- Jan 13, 2026
- Status
- Active
- Coverage
- Exempt
- Carrier
- —
- Policy Number
- —
- Effective
- Mar 24, 2025
- Expires
- —
This contractor warrants a closer look before contracting:
- Workers' comp listed as exempt
An automated summary of public CSLB data, not a credit score, rating, or endorsement. How we determine this
Is Mainstream Plumbing licensed in California?
Yes. Mainstream Plumbing holds California Contractors State License Board license number 959182, which is active and in good standing. The license was first issued on March 24, 2011. It is valid through March 31, 2027.
What does Mainstream Plumbing specialize in?
Mainstream Plumbing is licensed for one CSLB classification: C-36 Plumbing Contractor.
Where is Mainstream Plumbing headquartered?
Mainstream Plumbing is headquartered at 1393 Eastside Rd, El Cajon, CA 92020, in San Diego County, California.
Does Mainstream Plumbing have an active surety bond on file with CSLB?
Yes. Mainstream Plumbing has an active California contractor surety bond filed with Atlantic Specialty Insurance Company.
Does Mainstream Plumbing carry workers' compensation coverage?
Mainstream Plumbing reports an exempt workers' compensation status, meaning the business has no employees on payroll.
How do I verify Mainstream Plumbing's contractor license?
You can verify Mainstream Plumbing's license directly with the California Contractors State License Board at https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=959182.
- License issuedMar 24, 2011
- WC coverage startsMar 24, 2025
- Bond activeJan 13, 2026
- License expiresMar 31, 2027
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