Diamond Bar Contractor Verification - Page 4

294 contractors checked against 6 data sources (Page 4 of 6)

294

Total Contractors

281

Active Licenses

4

Federal Records

Diamond Bar Contractors

Showing contractors 151-200 of 294

KP PLUMBING INC

Clear

License #1044093 · C36

Active

KRUBINSKI SEAN

Clear

License #992919 · B

Active

L B AIR CONDITIONING

Clear

License #1072480 · C20

Active

L L L DEVELOPMENT INC

Clear

License #923665 · B

Active

LAMBARENA JORGE

Clear

License #759138 · B

Active

LANYI USA INC

Clear

License #1121762 · C20

Work Comp Susp

LAU HAMILTON

Clear

License #750158 · C36

Contr Bond Susp

LEXAR CONSTRUCTION

Clear

License #1074012 · B

Active

LIAO HSUEH YU

Clear

License #769733 · B

Active

LIBERTY WOODWORKING

Clear

License #903696 · C-6

Active

LIGHT CONTRACTING

Clear

License #1122793 · C-2

Active

LIKAI CHEN HVAC INC

Clear

License #926434 · C20

Active

LIM JAE H

Clear

License #721424 · C27

Active

LIU YIN PING

Clear

License #960083 · C10

Active

LIZARRAGA RICARDO A

Clear

License #1109743 · B

Active

LJD CONSTRUCTION INC

Clear

License #1061468 · B

Active

LUCAS ELECTRICAL

Clear

License #888594 · C10

Active

M & E MANAGEMENT GROUP INC

Clear

License #969068 · B

Active

M D B DESIGN ASSOCIATES

Clear

License #653762 · B

Active

M S T CONSTRUCTION

Clear

License #837086 · B

Active

M T QUALITY CONSTRUCTION

Clear

License #586957 · B

Active

MAC REFRIGERATION AND AIR CONDITIONING CO

Clear

License #580557 · C20

Active

MAISON BUILDERS INC

Clear

License #1134077 · B

Active

MALO DOUGLAS CHARLES CONSTRUCTION

Clear

License #972557 · B

Active

MANAGA RAUL MANUEL

Clear

License #1005647 · B

Active

MARKEASY ROOFING INC

Clear

License #1047408 · C39

Contr Bond Susp

MARTIN DOLORES K

Clear

License #430320 · C27

Active

MASTER PAINTING CO

Clear

License #658145 · C33

Active

MCDONALD CONSTRUCTION

Clear

License #870492 · B

Active

MCMASTER MECHANICAL

Clear

License #879152 · C20

Active

MEDRARA HVAC

Clear

License #1042958 · C20

Active

MILLER G DEVELOPMENT CO

Clear

License #325200 · B

Active

MING'S CONSTRUCTION AND HOTEL RENOVATION

Clear

License #973795 · B

Active

MIRAE CONSTRUCTION CO

Clear

License #876472 · A

Active

MONAIR CONTRACTORS

Clear

License #677543 · B

Active

MONARCH DECK COATINGS

Clear

License #974168 · D06

Active

MONARCH INFORMATION SYSTEMS LLC

Clear

License #1007648 · C10

Active

MR A/C

Clear

License #864636 · C20

Active

MTZ DEVELOPMENT

Clear

License #981566 · A

Active

NARTIN CONSTRUCTION & HOME IMPROVEMENT

Clear

License #1044853 · B

Active

NEW LIFE CONSTRUCTION

Clear

License #1148327 · B

Active

NEW LIFE CONSTRUCTION AND RENOVATION

Clear

License #1039347 · B

Active

NEXERA BUILDERS INC

Clear

License #1037400 · B

Active

NEXVILLE CONSTRUCTION INC

Clear

License #1035410 · B

Active

NG KACHUNG

Clear

License #547015 · B

Active

NIELSEN ELECTRIC

Clear

License #950973 · C10

Active

NING CONSTRUCTION

Clear

License #958376 · B

Active

OXFORD PAINTING

Clear

License #580795 · C33

Active

PACHUCA CONSTRUCTION

Clear

License #1023592 · B

Active

PACIFIC OVERHEAD DOORS

Clear

License #373281 · D28

Active

How to Verify a Contractor in Diamond Bar

Manual contractor vetting takes 45+ minutes per sub and still misses violations in databases you don't know exist. SiteVetter runs 6 data source checks in seconds: CSLB license status, SAM.gov federal debarment, DOL wage violations, OSHA safety citations, EPA environmental records, and building permits.

Contractors in Diamond Bar serve local residential and commercial construction needs.

Of the 294 CSLB-registered contractors in Diamond Bar, 96% hold active licenses and 4 have at least one record in federal databases. Under California's "Controlling Employer" doctrine, general contractors can be held liable for subcontractor safety violations—making verification a legal necessity, not optional due diligence.

5-Point Verification Checklist for Diamond Bar Contractors

  • CSLB License: Confirm Active status (not Suspended, Revoked, or Expired)
  • Workers' Comp: Verify current coverage—exempt status means no employees
  • Contractor Bond: California requires $25,000 minimum (SB 607, Jan 2023)
  • Federal Debarment: Search SAM.gov for exclusion records
  • Safety & Wage History: Check OSHA citations and DOL wage violations

Data sourced from California Contractors State License Board and federal databases. Updated weekly. For official verification, check directly with CSLB.