Licensed Contractors in Diamond Bar, CA - Page 4

310 CSLB contractor license records for Diamond Bar (Page 4 of 7)

310

Total Contractors

295

Active Licenses

4

Federal Records

Diamond Bar Contractor License Records

Showing contractors 151-200 of 310

K M K GLAZING CONTRACTORS

Clear

License #917948 · C17

Active

KERTLAND ROOFING INC

Clear

License #510174 · B

Active

KITCHEN AND FLOORING CENTER INC

Clear

License #968078 · B

Active

KO JONATHAN

Clear

License #939589 · B

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

Active

LAU HAMILTON

Clear

License #750158 · C36

Contr Bond Susp

LD CONSTRUCTION

Clear

License #1154620 · B

Active

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

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License #888594 · C10

Active

M & E MANAGEMENT GROUP INC

Clear

License #969068 · B

Active

M D B DESIGN ASSOCIATES

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License #653762 · B

Active

M S T CONSTRUCTION

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License #837086 · B

Active

M T QUALITY CONSTRUCTION

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License #586957 · B

Active

MAC REFRIGERATION AND AIR CONDITIONING CO

Clear

License #580557 · C20

Active

MAISON BUILDERS INC

Clear

License #1134077 · B

Active

MAJ ENGINEERING

Clear

License #1089238 · A

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

MENGQI CONSTRUCTION

Clear

License #1150260 · B

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

Contr Bond Susp

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

Diamond Bar Contractor License Lookup

Use this page when you need a Diamond Bar contractor license lookup, a list of licensed general contractors in Diamond Bar, or a fast way to screen specialty subs before bid award. Each profile starts from CSLB license data and adds federal safety, wage, debarment, environmental, and permit records.

These records cover contractors based in Diamond Bar. The list includes general building contractors and specialty trades, with license number, status, primary classification, and federal record count shown before you open a full profile.

Of the 310 CSLB-registered contractors in Diamond Bar, 95% hold active licenses and 4 have at least one record in federal databases. For GCs verifying subs, that means a standard CSLB status check is only the first pass; the risk review also needs workers' comp, bond, SAM.gov, OSHA, DOL, EPA, and permit checks.

What to Check 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.