Mainline Builders INC, B General Building Contractor in Concord, CA
Mainline Builders INC operating as a corporation holds an active California contractor license (CSLB #1057090), valid through Aug 31, 2027. First issued in 2019, the license has been on the CSLB roster for 7 years. It carries a single CSLB classification: B — General Building Contractor. Records show an active surety bond on file with Western Surety Company and an exempt workers' compensation status (no employees on payroll). The business is based in Concord, in Contra Costa County, California.
- License Number
- 1057090
- Issued
- Aug 15, 2019
- Status
- CLEAR
- Expires
- Aug 31, 2027
- Entity
- Corporation
- Surety
- Western Surety Company
- Bond Number
- 67449616
- Effective
- Aug 15, 2025
- Status
- Active
- Coverage
- Exempt
- Carrier
- —
- Policy Number
- —
- Effective
- Aug 15, 2025
- 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 Mainline Builders INC licensed in California?
Yes. Mainline Builders INC holds California Contractors State License Board license number 1057090, which is active and in good standing. The license was first issued on August 15, 2019. It is valid through August 31, 2027.
What does Mainline Builders INC specialize in?
Mainline Builders INC is licensed for one CSLB classification: B General Building Contractor.
Where is Mainline Builders INC headquartered?
Mainline Builders INC is headquartered at 1783 Landana Dr Unit B, Concord, CA 94519, in Contra Costa County, California.
Does Mainline Builders INC have an active surety bond on file with CSLB?
Yes. Mainline Builders INC has an active California contractor surety bond filed with Western Surety Company.
Does Mainline Builders INC carry workers' compensation coverage?
Mainline Builders INC reports an exempt workers' compensation status, meaning the business has no employees on payroll.
How do I verify Mainline Builders INC's contractor license?
You can verify Mainline Builders INC's license directly with the California Contractors State License Board at https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=1057090.
- License issuedAug 15, 2019
- Bond activeAug 15, 2025
- WC coverage startsAug 15, 2025
- License expiresAug 31, 2027
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