Instone Manufacturing INC, C-54 Ceramic and Mosaic Tile Contractor in San Leandro, CA
Instone Manufacturing INC operating as a corporation holds California contractor license #738175, which is currently expired (lapsed Jun 30, 2026) and not valid to contract until it is renewed. First issued in 1997, the license has been on the CSLB roster for 29 years. It carries a single CSLB classification: C-54 — Ceramic and Mosaic Tile Contractor. Records show an active surety bond on file with American Contractors Indemnity Company and active workers' compensation coverage from Massachusetts Bay Insurance Company. The business is based in San Leandro, in Alameda County, California.
- License Number
- 738175
- Issued
- Jul 17, 1997
- Status
- CLEAR
- Expires
- Jun 30, 2026
- Entity
- Corporation
- Surety
- American Contractors Indemnity Company
- Bond Number
- 100245007
- Effective
- Jan 1, 2023
- Status
- Active
- Coverage
- Workers' Compensation Insurance
- Carrier
- Massachusetts Bay Insurance Company
- Policy Number
- WDFM205045
- Effective
- Nov 6, 2025
- Expires
- Nov 6, 2026
This contractor has a compliance issue in its public CSLB record:
- License expired
An automated summary of public CSLB data, not a credit score, rating, or endorsement. How we determine this
Is Instone Manufacturing INC licensed in California?
Instone Manufacturing INC previously held California Contractors State License Board license number 738175, but the license expired on June 30, 2026 and is not currently valid. It was first issued on July 17, 1997.
What does Instone Manufacturing INC specialize in?
Instone Manufacturing INC is licensed for one CSLB classification: C-54 Ceramic and Mosaic Tile Contractor.
Where is Instone Manufacturing INC headquartered?
Instone Manufacturing INC is headquartered at 1629 Doolittle Drive, San Leandro, CA 94577, in Alameda County, California.
Does Instone Manufacturing INC have an active surety bond on file with CSLB?
Yes. Instone Manufacturing INC has an active California contractor surety bond filed with American Contractors Indemnity Company.
Does Instone Manufacturing INC carry workers' compensation coverage?
Yes. Instone Manufacturing INC carries active workers' compensation coverage through Massachusetts Bay Insurance Company.
How do I verify Instone Manufacturing INC's contractor license?
You can verify Instone Manufacturing INC's license directly with the California Contractors State License Board at https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=738175.
- License issuedJul 17, 1997
- Bond activeJan 1, 2023
- WC coverage startsNov 6, 2025
- License expiredJun 30, 2026
- WC expiresNov 6, 2026
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