M B Development, B General Building Contractor in Castro Valley, CA
M B Development operating as a sole owner holds an active California contractor license (CSLB #778837), valid through May 31, 2028. First issued in 2000, the license has been on the CSLB roster for 26 years. It carries a single CSLB classification: B — General Building Contractor. Records show an active surety bond on file with Merchants Bonding Company (mutual) and an exempt workers' compensation status (no employees on payroll). The business is based in Castro Valley, in Alameda County, California.
- License Number
- 778837
- Issued
- May 11, 2000
- Status
- CLEAR
- Expires
- May 31, 2028
- Entity
- Sole Owner
- Surety
- Merchants Bonding Company (mutual)
- Bond Number
- 101627648
- Effective
- Nov 21, 2025
- Status
- Active
- Coverage
- Exempt
- Carrier
- —
- Policy Number
- —
- Effective
- Apr 7, 2026
- Expires
- —
This contractor warrants a closer look before contracting:
- Workers' comp listed as exempt
An automated summary of public CSLB data, not a credit score, rating, or endorsement. How we determine this
Is M B Development licensed in California?
Yes. M B Development holds California Contractors State License Board license number 778837, which is active and in good standing. The license was first issued on May 11, 2000. It is valid through May 31, 2028.
What does M B Development specialize in?
M B Development is licensed for one CSLB classification: B General Building Contractor.
Where is M B Development headquartered?
M B Development is headquartered at 5593 Trailside Ct, Castro Valley, CA 94552, in Alameda County, California.
Does M B Development have an active surety bond on file with CSLB?
Yes. M B Development has an active California contractor surety bond filed with Merchants Bonding Company (mutual).
Does M B Development carry workers' compensation coverage?
M B Development reports an exempt workers' compensation status, meaning the business has no employees on payroll.
How do I verify M B Development's contractor license?
You can verify M B Development's license directly with the California Contractors State License Board at https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=778837.
- License issuedMay 11, 2000
- Bond activeNov 21, 2025
- WC coverage startsApr 7, 2026
- License expiresMay 31, 2028
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