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California contractor license
Magnum Plumbing Company Inc
Magnum Plumbing Company Inc of Oceanside holds California license 1027259 (C36 Plumbing). The CSLB file dated Nov 2, 2026 lists it as active.1 It expires Jul 31, 2028.
Licensed 9 years, longer than 58% of 53 active Oceanside plumbing contractors.
Active
- Workers' comp ends Dec 19, 2026 (47 days)
Magnum Plumbing Company Inc, Oceanside
- Board action on file.
- License
- 1027259
- Class
- C36 Plumbing
- Expires
- Jul 31, 2028
- Bond
- $25,000
- Workers' comp
- Insured to Dec 19, 2026
CSLB file dated Nov 2, 2026
From the CSLB file dated Nov 2, 2026. Not a consumer report; check the board before you hire.
Has the board taken action on this license?
- Jul 6, 2018 — Disciplinary bond (issuance) — Case 2011001998 — Ended Aug 8, 2019
From the CSLB file dated Nov 2, 2026. Confirm with the board. CSLB license check
What bond, insurance and workers' comp are on file?
- Bond
- $25,000American Contractors Indemnity Company, from Aug 17, 2026, continuous
- Liability insurance
- Not in the CSLB fileCheck with the board
- Workers' comp
- InsuredAmtrust Insurance Company, from Dec 19, 2025, to Dec 19, 2026
Who is on this license?
- Officer
- Maryanne T. MartinSince Jul 6, 2018
- Responsible managing officer, CEO and president
- Aven F. MartinSince May 25, 2017
What work does this license cover?
Issued May 25, 2017. Reissued Jul 6, 2018.
Which other Oceanside businesses hold C36 Plumbing?
- T K Plumbing IncLicensed since 2014
- All About PlumbingLicensed since 2016
- NLB PlumbingLicensed since 2019
- Rogers Mr Neighborhood Plumbing IncLicensed since 2019
- New Way Plumbing IncLicensed since 2021
What should you check before hiring?
What to ask before you hire
- Ask whether it has been renewed. Something on this license ends within 60 days. Check again before you pay a deposit.
- Get the license number in writing. The name on the license should match the name on your contract and invoice.
- Check the class covers the job. A license for one trade doesn't cover another. California license classes
- Ask for a certificate of insurance sent to you by the insurance agent, not handed over by the contractor. How to read a COI
- Ask who will be on site. If a crew works on your property, ask for proof of workers' comp. An exemption on file means the contractor told the CSLB it has no employees.
- Put it in a written contract: license number, price, start date and payment schedule. Check the license again on the day you sign.
If the license is lapsed
- Don't sign or pay a deposit until the CSLB shows the license active again.
- Ask the contractor why. For a bond or insurance lapse, ask for proof that the new bond or policy was filed with the CSLB, then check again.
- If work has started, hold further payments, keep the contract, receipts and photos, and file a complaint with Contractors State License Board (CSLB).
- Check another contractor. California license lookup
Sources
- CSLB License Master (cslb.ca.gov, Nov 2, 2026)
- Contractors State License Board (CSLB)