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California contractor license
M B & Sons Plumbing Inc
M B & Sons Plumbing Inc of Gardena holds California license 833750 (C36 Plumbing). The CSLB file dated Nov 1, 2026 lists it as active.1 It expires Aug 31, 2028.
Licensed 22 years, longer than 65% of 29 active Gardena plumbing contractors.
Active
M B & Sons Plumbing Inc, Gardena
- License
- 833750
- Class
- C36 Plumbing
- Expires
- Aug 31, 2028
- Bond
- $25,000
- Workers' comp
- Insured to Feb 15, 2027
CSLB file dated Nov 1, 2026
From the CSLB file dated Nov 1, 2026. Not a consumer report; check the board before you hire.
Has the board taken action on this license?
None in the CSLB file dated Nov 1, 2026. Confirm with the board: CSLB license check
What bond, insurance and workers' comp are on file?
- Bond
- $25,000American Contractors Indemnity Company, from Jun 1, 2025, continuous
- Liability insurance
- Not in the CSLB fileCheck with the board
- Workers' comp
- InsuredPie Insurance Company (The), from Feb 15, 2024, to Feb 15, 2027
Who is on this license?
- Officer
- Luisa BernardinoSince Aug 29, 2008
- Responsible managing officer, CEO and president
- Manuel BernardinoSince Mar 10, 2004
What work does this license cover?
Issued Mar 10, 2004. Reissued Aug 29, 2008.
Which other Gardena businesses hold C36 Plumbing?
- Rooter King Plumbing IncLicensed since 1982
- M P D Plumbing IncorporatedLicensed since 2008
- Jet Drain Plumbing & Rooter IncLicensed since 2010
- Soo Hipp Plumbing And DrainsLicensed since 2011
- Miracle Worker Plumbing IncLicensed since 2026
What should you check before hiring?
What to ask before you hire
- 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 1, 2026)
- Contractors State License Board (CSLB)