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California contractor license
Robo One Plumbing Corporation
Robo One Plumbing Corporation of Fontana holds California license 639506 (A General Engineering, C34 Pipeline, C36 Plumbing, C42 Sanitation System). The CSLB file dated Nov 1, 2026 lists it as active.1 It expires Sep 30, 2028.
Licensed 34 years, longer than 95% of 23 active Fontana plumbing contractors.
Active
Robo One Plumbing Corporation, Fontana
- License
- 639506
- Class
- A General Engineering; C34 Pipeline; C36 Plumbing; C42 Sanitation System
- Expires
- Sep 30, 2028
- Bond
- $25,000
- Workers' comp
- Insured to Jan 9, 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
- $25,000Philadelphia Indemnity Insurance Company, from May 26, 2026, continuous
- Liability insurance
- Not in the CSLB fileCheck with the board
- Workers' comp
- InsuredMid-Century Insurance Company, from Jan 9, 2026, to Jan 9, 2027
Who is on this license?
- Officer
- Angela J. OberoSince Dec 31, 2001
- Officer
- Austin J. OberoSince Jun 22, 2023
- Responsible managing officer, CEO and president
- Noel D. OberoSince Mar 14, 1992
What work does this license cover?
Issued Mar 14, 1992. Reissued Sep 23, 1996.
- A General Engineering
- C34 Pipeline
- C36 Plumbing
- C42 Sanitation System
Which other Fontana businesses hold A General Engineering?
- K & L Contracting IncLicensed since 1988
- Gold Coast Refractory ServiceLicensed since 1988
- STC Netcom IncLicensed since 1992
- Burrtec Waste Industries IncLicensed since 2001
- Steadfast Construction Services IncLicensed since 2004
California plumbing contractorsGeneral Contractors in FontanaCalifornia general contractors
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)