Contractor · Clayton, Contra Costa County
Prostone World INC
California contractor license · licensed since 2018 (8 years).
✓ Status CLEAR✓ Checked Oct 27, 2026✓ Facts from CSLB License Master
About this record
This page shows what the Contractors State License Board publishes in the License Master about license #1040939. Classifications: C54 · Tile. Phone is from the CSLB file. We do not recommend or refer. Status can change after our check date; the official CSLB Instant License Check is the source of truth.
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