| Company | Location | Certifications | License # |
|---|---|---|---|
| Albert'S Plumbing & Drain Service | Santa Cruz, CA | Installer (C-42) | 877333 |
| Browns Underground Septic Construction | Soquel, CA | Installer (C-42) | 1019245 |
| Duran Development | Santa Cruz, CA | Installer (C-42) | 945693 |
| Garrison Plumbing Inc | Scotts Valley, CA | Installer (C-42) | 967752 |
| Granite - Griffith A Joint Venture | Watsonville, CA | Installer (C-42) | 1112031 |
| Granite Construction Company | Watsonville, CA | Installer (C-42) | 89 |
| Hudson Brothers Inc | Scotts Valley, CA | Installer (C-42) | 1017025 |
| Maggiora Bros Drilling Inc | Watsonville, CA | Installer (C-42) | 249957 |
| Mr Rooter Plumbing Of Santa Cruz | Aptos, CA | Installer (C-42) | 903756 |
| Redwood Pipe And Drain Inc | Scotts Valley, CA | Installer (C-42) | 1041518 |
| Wade'S Plumbing & Septic | Ben Lomond, CA | Installer (C-42) | 1087260 |
11 companies in the CSLB Licensed C-42 Sanitation System Contractors are based in Santa Cruz County as of 2026-07-23. Companies based elsewhere in California also commonly serve the county.
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