P O Box 450, Sonoma, CA 95476 · Sonoma County
Is Peterson Mechanical Inc licensed?
Peterson Mechanical Inc appears on a California septic license or certification list. The Septic Guide matched these credentials to the issuing agency's published list as of October 2026; confirm the current status with the agency before you hire.
| Credential | Number | Issued by | Verify |
|---|---|---|---|
| California Licensed Contractor (B, C-4, C16, C20, C34, C36, C38, C42, C43) | 171486 | California Contractors State License Board | Agency lookup |
A matched credential shows the holder was on the agency's list when we checked. It does not by itself authorize every kind of septic work: an installer license, a pumper license and an inspector certification are different credentials.
What septic services does Peterson Mechanical Inc offer?
Implied by its state license: Septic system installation.
Ask Peterson Mechanical Inc to confirm it handles your specific job and service area. Guides: Septic system installation.
Before you hire Peterson Mechanical Inc
- Check the license on the agency lookup above and ask which person holds it.
- Ask who pulls the permit and whether the fee is in the quote.
- Ask for proof of liability insurance sent by the insurer.
- Get the scope and price in writing. How to check a septic license.
Is this your business? Correct or update this listing. Listing data: state license lists and public business information, as of October 2026. Not an endorsement.