# Tier One Plumbing

Tier One Plumbing is a fire sprinkler company based in Los Angeles, California. It holds an active CSLB C-16 Fire Protection Contractor license (No. 972037) from the California Contractors State License Board, verified against state records on October 24, 2026.

## California Contractors State License Board licenses

| License | Type | Expires | Status |
|---|---|---|---|
| 972037 | CSLB C-16 Fire Protection Contractor | March 31, 2028 | active |

## Contact and locations

- Phone: 310-391-7744
- Primary location: 3517 Inglewood Blvd, Los Angeles, CA 90066 (Los Angeles County)

## Verify

Search 972037 at https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/CheckLicense.aspx to confirm current status.

More companies in Los Angeles: https://plumbregistry.com/fire-protection/california/los-angeles/

_Source: California Contractors State License Board (CSLB) licensee records (https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/CheckLicense.aspx), retrieved October 24, 2026. Published by Plumb Registry._