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California contractor license
Wincon Service Inc
Wincon Service Inc of Chino holds California license 576739 (B General Building). The CSLB file dated Oct 30, 2026 lists it as active.1 It expires Feb 28, 2027.
Licensed 37 years, longer than 89% of 199 active Chino general contractors.
Active
Wincon Service Inc, Chino
- License
- 576739
- Class
- B General Building
- Expires
- Feb 28, 2027
- Bond
- $25,000
- Workers' comp
- Insured to Aug 5, 2027
CSLB file dated Oct 30, 2026
From the CSLB file dated Oct 30, 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 Oct 30, 2026. Confirm with the board: CSLB license check
What bond, insurance and workers' comp are on file?
- Bond
- $25,000Business Alliance Insurance Company, from Feb 20, 2025, continuous
- Liability insurance
- Not in the CSLB fileCheck with the board
- Workers' comp
- InsuredPie Insurance Company (The), from Aug 5, 2025, to Aug 5, 2027
Who is on this license?
- Officer
- Chung-Tuo WuSince Feb 20, 2025
- Responsible managing officer, CEO and president
- Winston LiuSince Sep 7, 1989
What work does this license cover?
Issued Sep 7, 1989. Inactive May 1, 2018 to May 31, 2019. Reissued Feb 20, 2025.
Which other Chino businesses hold B General Building?
- Albers MFG Co IncLicensed since 1971
- Marquis Construction IncLicensed since 1981
- Cornell Custom ConstructionLicensed since 1993
- Cal State Construction Services IncLicensed since 1994
- Horton R J Construction Supply IncLicensed since 2000
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, Oct 30, 2026)
- Contractors State License Board (CSLB)