Prostone World Inc
Prostone World Inc is an active, licensed contractor operating in Clayton, CA. Operating under a California contractor license established in 2018. They hold a C-54 Ceramic and Mosaic Tile Contractor license. They currently maintain an active contractor bond and workers' compensation insurance. No disciplinary actions have been recorded against this license.
License Information
- License Number
- 1040939
- Status
- Active
- Classification(s)
- C-54: Ceramic and Mosaic Tile Contractor
- Tenure
- Licensed since 2018 (7 years)
- Issue Date
- June 20, 2018
- Expiration Date
- June 30, 2026
- Disciplinary Record
- No Disciplinary Actions
Bond & Insurance
- Contractor Bond
- Bonded ($25000) – PHILADELPHIA INDEMNITY INSURANCE COMPANY
- Workers’ Compensation
- Workers' Compensation Insurance – STATE COMPENSATION INSURANCE FUND
A contractor’s bond protects consumers up to the bond amount if the contractor fails to fulfill contractual obligations or violates CSLB regulations.
Workers’ compensation insurance protects homeowners from liability if a contractor’s employee is injured on the job site.
Location
- Address
- 13980 MARSH CREEK RD
- City
- Clayton, CA
- ZIP Code
- 94517
- Phone
- (925) 594-1660
About This License Type
C-54: Ceramic and Mosaic Tile Contractor
Prepares surfaces and installs glazed wall, ceramic, mosaic, quarry, paver, faience, glass mosaic, and stone tiles; thin tile resembling full brick; and natural or simulated stone slabs for bathtubs, showers, and horizontal surfaces.
Not authorized: Does not include hollow or structural partition tile.
Verify on Official CSLB Website
License data sourced from the California Contractors State License Board. Last data update: February 20, 2026.