M-23 Mechanical Systems
M-23 Mechanical Systems operating as a corporation is licensed in California under CSLB number 1083192. The license was first issued in 2021, putting the business at 5 years on the active CSLB roster. It carries a single CSLB classification: C-20 — HVAC Contractor. Records show an active surety bond on file with Merchants Bonding Company (mutual) and a previously-filed workers' compensation policy with Security National Insurance Company that is no longer active. The business is based in Danville, in Contra Costa County, California.
- License Number
- 1083192
- Issued
- Nov 1, 2021
- Status
- CLEAR
- Expires
- Nov 30, 2027
- Entity
- Corporation
- Surety
- Merchants Bonding Company (mutual)
- Bond Number
- 101643381
- Effective
- Oct 19, 2025
- Status
- Active
- Coverage
- Workers' Compensation Insurance
- Carrier
- Security National Insurance Company
- Policy Number
- BAOT9985482442G
- Effective
- May 1, 2025
- Expires
- May 1, 2026
This contractor has a compliance issue in its public CSLB record:
- No active workers' comp on file
An automated summary of public CSLB data, not a credit score, rating, or endorsement. How we determine this
Is M-23 Mechanical Systems licensed in California?
Yes. M-23 Mechanical Systems holds California Contractors State License Board license number 1083192. The license was first issued on November 1, 2021. It is valid through November 30, 2027.
What does M-23 Mechanical Systems specialize in?
M-23 Mechanical Systems is licensed for one CSLB classification: C-20 HVAC Contractor.
Where is M-23 Mechanical Systems headquartered?
M-23 Mechanical Systems is headquartered at 3470 Fostoria Wy Ste D, Danville, CA 94526, in Contra Costa County, California.
Does M-23 Mechanical Systems have an active surety bond on file with CSLB?
Yes. M-23 Mechanical Systems has an active California contractor surety bond filed with Merchants Bonding Company (mutual).
Does M-23 Mechanical Systems carry workers' compensation coverage?
M-23 Mechanical Systems has a previously-filed workers' compensation policy with Security National Insurance Company that is no longer active.
How do I verify M-23 Mechanical Systems's contractor license?
You can verify M-23 Mechanical Systems's license directly with the California Contractors State License Board at https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=1083192.
- License issuedNov 1, 2021
- WC coverage startsMay 1, 2025
- Bond activeOct 19, 2025
- WC expiredMay 1, 2026
- License expiresNov 30, 2027
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