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California contractor license
Trumark Construction Services Inc
Trumark Construction Services Inc of San Ramon holds California license 935932 (B General Building). The CSLB file dated Oct 29, 2026 lists it as active.1 It expires Jul 31, 2027.
Licensed 17 years, longer than 61% of 90 active San Ramon general contractors.
Active
- Workers' comp ends Dec 1, 2026 (33 days)
Trumark Construction Services Inc, San Ramon
- License
- 935932
- Class
- B General Building
- Expires
- Jul 31, 2027
- Bond
- $25,000
- Workers' comp
- Insured to Dec 1, 2026
CSLB file dated Oct 29, 2026
From the CSLB file dated Oct 29, 2026. Not a consumer report; check the board before you hire.
What bond, insurance and workers' comp are on file?
- Bond
- $25,000Harco National Insurance Company, from Jan 1, 2023, continuous
- Liability insurance
- Not in the CSLB fileCheck with the board
- Workers' comp
- InsuredBerkshire Hathaway Homestate Insurance Company, from Dec 1, 2025, to Dec 1, 2026
Who is on this license?
- CEO and president
- John WillsieSince Jul 21, 2023
- Responsible managing employee
- Anthony T. BosowskiSince Jul 24, 2019
What work does this license cover?
Issued Jul 30, 2009.
Which other San Ramon businesses hold B General Building?
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, Oct 29, 2026)
- Contractors State License Board (CSLB)