Mainline Plumbing Services LLC, C-36 Plumbing Contractor in Lomita, CA
Mainline Plumbing Services LLC operating as a limited liability holds an active California contractor license (CSLB #1145319), valid through Oct 31, 2027. First issued in 2025, the license has been on the CSLB roster for 1 year. It carries a single CSLB classification: C-36 — Plumbing Contractor. Records show an active surety bond on file with Merchants Bonding Company (mutual) and active workers' compensation coverage from Clear Spring Property and Casualty Company. The business is based in Lomita, in Los Angeles County, California.
- License Number
- 1145319
- Issued
- Oct 21, 2025
- Status
- CLEAR
- Expires
- Oct 31, 2027
- Entity
- Limited Liability
- Surety
- Merchants Bonding Company (mutual)
- Bond Number
- 101617794
- Effective
- Aug 28, 2025
- Status
- Active
- Coverage
- Workers' Compensation Insurance
- Carrier
- Clear Spring Property and Casualty Company
- Policy Number
- CWC03593300
- Effective
- Sep 9, 2025
- Expires
- Sep 9, 2026
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 Mainline Plumbing Services LLC licensed in California?
Yes. Mainline Plumbing Services LLC holds California Contractors State License Board license number 1145319, which is active and in good standing. The license was first issued on October 21, 2025. It is valid through October 31, 2027.
What does Mainline Plumbing Services LLC specialize in?
Mainline Plumbing Services LLC is licensed for one CSLB classification: C-36 Plumbing Contractor.
Where is Mainline Plumbing Services LLC headquartered?
Mainline Plumbing Services LLC is headquartered at 2319 246th Place, Lomita, CA 90717, in Los Angeles County, California.
Does Mainline Plumbing Services LLC have an active surety bond on file with CSLB?
Yes. Mainline Plumbing Services LLC has an active California contractor surety bond filed with Merchants Bonding Company (mutual).
Does Mainline Plumbing Services LLC carry workers' compensation coverage?
Yes. Mainline Plumbing Services LLC carries active workers' compensation coverage through Clear Spring Property and Casualty Company.
How do I verify Mainline Plumbing Services LLC's contractor license?
You can verify Mainline Plumbing Services LLC's license directly with the California Contractors State License Board at https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=1145319.
- Bond activeAug 28, 2025
- WC coverage startsSep 9, 2025
- License issuedOct 21, 2025
- WC expiresSep 9, 2026
- License expiresOct 31, 2027
- Sheflo Plumbing CO#91479Agoura Hills·C-20 HVAC Contractor
- Hoskins Plumbing#91761Whittier·C-20 HVAC Contractor
- West B Plumbing#121703North Hollywood·C-36 Plumbing Contractor
- Acco Engineered Systems#120696Pasadena·A General Engineering Contractor
- Darrow Heating and Air Conditioning CORP#114301North Hollywood·B General Building Contractor
- G E M Plumbing INC#111308Sierra Madre·C-20 HVAC Contractor
- Red Lilly Plumbing INC#218270Los Angeles·C-20 HVAC Contractor
- Quality Plumbing#218690Glendale·C-36 Plumbing Contractor
Working a California job with Mainline Plumbing Services LLC, or chasing an unpaid invoice? These free tools track your mechanics lien deadlines and rights under California Civil Code §§8200–8848.
- California preliminary notice deadline calculatorFind your 20-day deadline and the lien rights at risk.
- Do I need a preliminary notice in California?Answer a few questions to see if the 20-day notice applies.
- Did I lose my California lien rights?Check whether your mechanics lien window has passed.
- Unpaid construction invoice in CaliforniaYour options and deadlines for collecting on a California job.
Own Mainline Plumbing Services LLC? Claim or correct this profile