Fire sprinkler
Tier One Mechanical Inc
Tier One Mechanical Inc is a fire sprinkler company based in Rancho Dominguez, California. It holds an active CSLB C-16 Fire Protection Contractor license (No. 1071811) from the California Contractors State License Board, verified against state records on October 24, 2026.
State license verified October 24, 2026
California Contractors State License Board licenses
| License | Type | Expires | Status |
|---|---|---|---|
| 1071811 | CSLB C-16 Fire Protection Contractor | December 31, 2026 | active |
Services
- Fire sprinkler. Design, installation, inspection, testing and maintenance of fire sprinkler systems, including underground fire mains and dwelling systems.
Services are inferred from the company's state licenses. Confirm specific capabilities with the company.
Locations
- Primary: 18414 S Santa Fe Avenue, Rancho Dominguez, CA 90221 · Los Angeles County
Source: California Contractors State License Board (CSLB) licensee records, retrieved October 24, 2026. Machine-readable: JSON · Markdown.