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Contractor license records in Diamond Bar, CA

312 records with Diamond Bar as their locality of record in CSLB's records, as of November 3, 2026. Statuses print as the board records them; a record listed as suspended is not a current credential.

Source: California Contractors State License Board (CSLB) — records as of November 3, 2026. Records change; the board’s own CSLB License Check is the current source.

By classification in Diamond Bar

General Building (180) · Electrical (46) · Warm-Air Heating, Ventilating and Air-Conditioning (35) · Plumbing (27) · General Engineering (14) · Painting and Decorating (12) · Low Voltage Systems (10) · Landscaping (9) · Ceramic and Mosaic Tile (8) · Flooring and Floor Covering (6) · Roofing (5) · Fire Protection (5) · Refrigeration (4) · Cabinet, Millwork and Finish Carpentry (4) · Concrete (3) · Hazardous Substance Removal Certification (3) · Concrete-Related Services (3) · Insulation and Acoustical (3) · Glazing (3) · Sign (2) · Elevator (2) · Water Conditioning (2) · Earthwork and Paving (2) · Drywall (2) · Sanitation System (2) · Pool and Spa Maintenance (2) · Tree Service (1) · Solar (1) · Masonry (1) · Synthetic Products (1) · Swimming Pool (1) · Structural Steel (1) · Doors, Gates and Activating Devices (1) · Asbestos Certification (1) · Building Moving/Demolition (1) · Ornamental Metal (1) · Well Drilling (1) · Boiler, Hot-Water Heating and Steam Fitting (1) · Residential Remodeling (1) · Prefabricated Equipment (1)

• MR A/C CLEAR
  License 864636 · expires September 30, 2027
• MYUNG WON I KIM CLEAR
  License 1159753 · expires August 31, 2028
• NEW LIFE CONSTRUCTION CLEAR
  License 1148327 · expires December 31, 2027
• NEW LIFE CONSTRUCTION AND RENOVATION CLEAR
  License 1039347 · expires August 31, 2028
• NEXERA BUILDERS INC CLEAR
  License 1037400 · expires March 31, 2028
• NEXVILLE CONSTRUCTION INC CLEAR
  License 1035410 · expires January 31, 2028
• NIELSEN ELECTRIC CLEAR
  License 950973 · expires August 31, 2028
• NING CONSTRUCTION CLEAR
  License 958376 · expires March 31, 2027
• OCEANLUX CONSTRUCTION INC CLEAR
  License 1153579 · expires May 31, 2028
• OXFORD PAINTING CLEAR
  License 580795 · expires May 31, 2028
• PACHUCA CONSTRUCTION CLEAR
  License 1023592 · expires February 28, 2027
• PACIFIC OVERHEAD DOORS Contr Bond Susp
  License 373281 · expires April 30, 2027
• PACIFIC RIM BUILDERS CLEAR
  License 871504 · expires January 31, 2028
• PADILLA'S GRADING AND PAVING CLEAR
  License 1093279 · expires June 30, 2028
• PARK S ROOFING USA CLEAR
  License 1142782 · expires August 31, 2027
• PATHFINDER CONSTRUCTION CLEAR
  License 1141723 · expires August 31, 2027
• PAUL QUIJANO CLEAR
  License 1115522 · expires January 31, 2028
• PERSPECTIVE LANDSCAPING INC CLEAR
  License 541581 · expires January 31, 2028
• PETER YIPING HU CLEAR
  License 1053475 · expires May 31, 2027
• PETRIE CUSTOM WOODWORKS CLEAR
  License 914575 · expires April 30, 2028
• PJCY RENOVATION CLEAR
  License 1095968 · expires August 31, 2028
• PLACE CONSTRUCTION & DEVELOPMENT INC CLEAR
  License 515653 · expires March 31, 2027
• PLHK HVAC INC CLEAR
  License 1151997 · expires March 31, 2028
• POST ELECTRIC COMPANY INC CLEAR
  License 768204 · expires November 30, 2028
• POWER PAINTING INC CLEAR
  License 711007 · expires November 30, 2027
• PRIMO HAND CONSTRUCTION & SERVICES CLEAR
  License 962220 · expires June 30, 2027
• PROFESSIONAL TILE INSTALLATION CLEAR
  License 712185 · expires September 30, 2027
• PROMISE DEVELOPMENT GROUP INC CLEAR
  License 925512 · expires November 30, 2026
• PROPERTY INVESTMENT AND DEVELOPMENT GROUP CLEAR
  License 1006865 · expires August 31, 2027
• PUB CONSTRUCTION INC CLEAR
  License 788668 · expires December 31, 2026
• QD POWER INC CLEAR
  License 1157184 · expires June 30, 2028
• QED FACTORY INC CLEAR
  License 1153759 · expires April 30, 2028
• QI TIAN CLEAR
  License 971912 · expires April 30, 2028
• QIN HVAC CLEAR
  License 1161560 · expires September 30, 2028
• QUALITY CONTRACT GLAZING CLEAR
  License 826550 · expires October 31, 2027
• QUARK LA ELECTRICAL CLEAR
  License 1112779 · expires November 30, 2027
• R A Z ELECTRIC Contr Bond Susp
  License 932271 · expires May 31, 2027
• R H CONSTRUCTION AND DESIGN INC Contr Bond Susp
  License 1054283 · expires August 31, 2027
• RALPH SALAZAR CLEAR
  License 819223 · expires April 30, 2027
• RAUL MANUEL MAGANA CLEAR
  License 1005647 · expires July 31, 2027
• RAY BI ELECTRICAL & ENERGY LLC CLEAR
  License 1125153 · expires May 31, 2028
• RAY ELECTRICAL ENGINEERING INC CLEAR
  License 1039207 · expires May 31, 2028
• REGIONAL SIGNS & LIGHTING CLEAR
  License 1036143 · expires February 29, 2028
• RICARDO A LIZARRAGA CLEAR
  License 1109743 · expires September 30, 2027
• RICHARD GLEN ROBERTS JR CLEAR
  License 963131 · expires July 31, 2027
• RICHARD L BAUGH DBA CORNERSTONE CONSTRUCTION CO CLEAR
  License 427183 · expires August 31, 2028
• RIVA PROPERTY MANAGEMENT CLEAR
  License 1053668 · expires May 31, 2027
• ROBERT VELAZQUEZ CONSTRUCTION CLEAR
  License 1072001 · expires December 31, 2026
• RODRIGUEZ & SONS GENERAL CONSTRUCTION INC CLEAR
  License 976744 · expires September 30, 2028
• ROGER HENRY CLEAR
  License 980170 · expires January 31, 2027

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