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88of 100 · v2

Tier One Mechanical Inc

Fire Protection Contractor · Rancho Dominguez, CA
Active license
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License1 record · Active license
Permits27 on file
Discipline / legalNo board discipline flag
BBBNot yet available
Phone(310) 637-1500
Address18414 S Santa Fe Avenue

Report verdict

Licensed & active (expires 2026-12-31) · No board discipline flag found in covered sources · 27 permits on file (Los Angeles)

88/100 HomeProFax Score — public-record factors only, not a rating of workmanship. How the score works Full report

The state board is the authority. A flag is a prompt to read the board record, not a verdict. Verify license status with the issuing board before you hire. See methodology and disclaimer & corrections.

What this report checks

✓ License
Checked
1 board record(s) · Active license
✓ Discipline & legal
Checked
No board discipline flag found in covered sources.
✓ Permits
Checked
27 permit(s) on file from covered city sources.
◐ Reviews & complaints
Where available
BBB where researched and approved HomeProFax reviews only; external ratings are linked below, not stored or scored.

Score breakdown

FactorPointsWhy
License status35/35
Active license on file with a state board
Discipline & legal flags20/20
No disciplinary flag on board record
Permit history20/20
27 permits on file
Reviews (BBB + HomeProFax)13/25
No BBB rating on file and no approved HomeProFax reviews yet (neutral). External ratings are linked below, not stored

A simple, transparent sum of public-record factors. How the score works. Not a rating of workmanship.

Source data as of: Report rebuilt from source files on 2026-10-19 · CSLB bond/workers' comp as of 2026-10-14 · most recent permit on file: 2023-04-17.

What we checked

LicenseCheckedCA Corporation #1071811 · active
BondChecked$25,000 with LIBERTY MUTUAL INSURANCE COMPANY · as of 2026-10-14
Workers' compCheckedWorkers' Compensation Insurance (FEDERAL INSURANCE COMPANY) · as of 2026-10-14
Years licensedCheckedLicensed since 2020
Business registrationNot available in CAState business registry not loaded yet
PermitsChecked27 permits on record
DisciplineCheckednone on record
OSHANot checked yetOSHA records not checked yet
Reviews & outside linksNot checked yetNo review lookup run yet
Contractor-providedNot checked yetNothing provided by the contractor yet

Public records as of their source dates. Board status is shown as reported by the board. Not a guarantee. Ask the contractor for their verified HomeProFax report.

Licenses

Licensed since 2020 (earliest original issue date on these state license records; not a business start date)

License #TypeStatusIssuedExpiresSource
CA 1071811Corporation (C16| C20| C36)
Workers' comp: Workers' Compensation Insurance (FEDERAL INSURANCE COMPANY); Contractor bond: $25000 (LIBERTY MUTUAL INSURANCE COMPANY)		clear2020-12-102026-12-31State board

Bond & workers' comp

Contractor bond$25,000 · LIBERTY MUTUAL INSURANCE COMPANY · effective 2023-01-01
Workers' compWorkers' Compensation Insurance · FEDERAL INSURANCE COMPANY · effective 2020-10-22 · expires 2027-04-01

Source: CSLB Public Data Portal (License Master), as of 2026-10-14. Verify current bond and insurance with CSLB and the insurer before you hire.

Building permits

DatePermitTypeAddressValue
2023-04-1723042-90000-08490Plumbing - Commercial384 WORLD WAY—
2023-04-1723042-90000-08492Plumbing - Commercial10201 PICO BLVD—
2023-01-3123045-90000-00036Pressure Vessel - Commercial21850 OXNARD ST—
2023-01-3123042-90000-01811Plumbing - Commercial100 GRAND AVE—
2023-01-3123042-90000-01810Plumbing - Commercial100 GRAND AVE—
2023-01-1923042-10000-01170Plumbing - Commercial725 FIGUEROA ST—
2023-01-1123042-90000-00671Plumbing - Commercial333 GRAND AVE—
2022-12-3022042-10001-16305Plumbing - Commercial6040 SUNSET BLVD—
2022-12-3022042-10001-16079Plumbing - Commercial633 5TH ST—
2022-10-1921042-10000-09375Plumbing - Commercial10900 WILSHIRE BLVD—
2022-10-0322042-90000-21248Plumbing - Commercial10250 SANTA MONICA BLVD—
2022-09-2922042-90000-21064Plumbing - Commercial1111 FIGUEROA ST—
2022-09-1522042-90000-19631Plumbing - Commercial801 FIGUEROA ST—
2022-09-0822042-10000-05051Plumbing - Commercial633 5TH ST—
2022-08-2922042-90000-18253Plumbing - Commercial12001 VENTURA PL—
2022-08-1522042-90000-16863Plumbing - Commercial1250 CAPRI DR—
2022-08-1522045-90000-00202Pressure Vessel - Commercial1250 CAPRI DR—
2022-08-0822042-90000-16305Plumbing - Commercial6040 SUNSET BLVD—
2022-08-0422042-90000-16079Plumbing - Commercial633 5TH ST—
2022-07-2022042-10000-14847Plumbing - Commercial11601 WILSHIRE BLVD—
2022-06-1622042-90000-12467Plumbing - Commercial101 LA BREA AVE—
2022-05-2522042-90000-10901Plumbing - Commercial10250 SANTA MONICA BLVD—
2021-11-1821042-90000-78298Plumbing - Commercial633 5TH ST—
2021-11-0321042-90000-71901Plumbing - Commercial101 LA BREA AVE—
2021-09-0621042-90000-26778Plumbing - Commercial1680 VINE ST—
2021-08-1021042-90000-16209Plumbing - Commercial10900 WILSHIRE BLVD—
2021-06-2421042-10000-12662Plumbing - Commercial2025 AVENUE OF THE STARS—

Source: City of Los Angeles Open Data (LADBS Building Permits)

Permit data: City of Los Angeles Open Data (LADBS Building Permits), licensed under CC BY 4.0. HomeProFax matched permits to licensed contractors; data modified from the original. Not endorsed by the City of Los Angeles. Los Angeles permits shown run through May 2023.

Discipline, complaints & legal

No board discipline or complaints found in our current sources. Federal court search (CourtListener): no state-consistent possible match in our last sample run, or not yet run for this contractor.

Around the web

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Reviews

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Homeowner reviews on HomeProFax

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Tier One Mechanical Inc · Fire Protection Contractor
Rancho Dominguez, CA
License on file: CA 10••••1811
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Sources for this report

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Trades on this license record

HVAC Contractors Plumbers

From the license types matched to this business.