Sanitation system contractors in Castro Valley, CA
3 licenses with the C-42 classification list Castro Valley (Alameda County) as their address with the state, 3 of them active. Active licenses with nothing flagged come first.
- Aaa Plumbing & Remodeling IncA · B · C-36 · C-42 · #1052769 Castro Valley · Alameda County Active
- Frank Bonetti Plumbing IncC-4 · C-20 · C-34 · C-36 +1 · #251165 Castro Valley · Alameda County Active
- Streamline Plumbing & Drain CoA · C-36 · C-42 · #672250 Castro Valley · Alameda County Active
Source: CSLB license file, Nov 8, 2026All trades in Castro Valley