California contractor license
TIER ONE MECHANICAL INC
- B General Building
- C16 Fire Protection
- C20 Warm-Air Heating, Ventilating And Air-Conditioning
- C36 Plumbing
TIER ONE MECHANICAL INC is a contractor with 4 license classifications, including B General Building and C16 Fire Protection, in Rancho Dominguez, Los Angeles County, licensed in California for 5 years (since 2020). As of Mar 30, 2026, the license is active with an expiration date of Dec 31, 2026 on record, a license bond is on file, and permit records show 1–10 permitted projects in the last 3 years.
TIER ONE MECHANICAL INCB General Building · C16 Fire Protection · C20 Warm-Air Heating, Ventilating And Air-Conditioning · C36 Plumbing · checked Mar 30, 2026
ActiveLicense number#1071811
Licensed sinceDec 10, 2020
Years licensed5 years
Expiration on recordDec 31, 2026
City and countyRancho Dominguez, Los Angeles County
License bondOn file
Projects1–10 permitted projects in the last 3 years
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Source: California Contractors State License Board (CSLB) and City of Los Angeles permit records. Last updated Mar 30, 2026.