California contractor licence #1071811

Tier One Mechanical INC

Tier One Mechanical INC holds California contractor licence 1071811 (Fire Protection, HVAC (Heating, Ventilating and Air-Conditioning), Plumbing) in Rancho Dominguez, Los Angeles County. Status: Active · expires Dec 31, 2026.

Activelicence status

2026-12expires Dec 31, 2026

$25,000contractor's bond

Insuredworkers' comp

What this means

The licence is active: CSLB lists its status as clear. That means no suspension is on file; it does not rate the quality of the work.
It expires in 53 days (Dec 31, 2026). California licences renew every two years; work done after expiry without renewal is unlicensed.
Contractor's bond: $25,000 with Liberty Mutual Insurance Company. The bond is there to pay consumers and workers harmed by licence-law violations; it is not liability insurance and it does not guarantee the work.
Workers' comp: Workers' Compensation Insurance with Federal Insurance Company, policy through Apr 1, 2027.

Watch this licence: $9/month. We email you when CSLB's file shows a change to this licence's status, bond, workers' comp or expiry. Checked every Monday and Thursday. Cancel any time.

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Licence details

Licence number	1071811
Business name (as CSLB lists it)	TIER ONE MECHANICAL INC
Business type	Corporation
Status	Active
Issued	Dec 10, 2020
Expires	Dec 31, 2026
City / county / ZIP	Rancho Dominguez / Los Angeles / 90221
Business phone	(310) 637 1500
Contractor's bond surety	Liberty Mutual Insurance Company
Bond amount	$25,000
Bond number	24248957
Bond effective	Jan 1, 2023
Workers' comp	Workers' Compensation Insurance
Workers' comp insurer	Federal Insurance Company
Workers' comp effective	Oct 22, 2020
Workers' comp expires	Apr 1, 2027
CSLB record last updated	Oct 22, 2026

Classifications

C-16 Fire Protection: fire sprinklers and fire protection systems
C-20 HVAC (Heating, Ventilating and Air-Conditioning): heating, ventilation and air-conditioning (HVAC) systems
C-36 Plumbing: water, gas and drain lines, fixtures and water heaters

Change history

Jan 1, 2023Current contractor's bond took effect (Liberty Mutual Insurance Company)
Dec 10, 2020Licence issued
Oct 22, 2020Current workers' comp record took effect

Changes come from comparing successive copies of CSLB's public licence master file (refreshed twice a week) since October 2026, plus the dates printed on the current record.

Need a bond or workers' comp quote?

If this is your licence and you need a contractor's bond, a replacement bond or workers' comp, request quotes from licensed providers. Free, no obligation.

Check the official record (free): CSLB licence 1071811 on cslb.ca.gov. Always confirm there before you hire or sign.

Rasengan Data is a private service, not CSLB. This page is built from the public CSLB licence master file as published; it may lag the live CSLB record by a few days. Not legal advice. Is this your licence and something looks wrong? CSLB's record is the source; email rasengan.win@gmail.com about this page.