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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)

• GALVAN PLUMBING CLEAR
  License 1065435 · expires April 30, 2028
• GARY & SON CONSTRUCTION CLEAR
  License 1138649 · expires June 30, 2027
• GARY'S AC SERVICES CLEAR
  License 921063 · expires August 31, 2028
• GIANT PALMS CONSTRUCTION INC CLEAR
  License 1072035 · expires December 31, 2026
• GONZALEZ ELECTRIC CLEAR
  License 962683 · expires June 30, 2027
• GOOD TIDINGS CONSTRUCTION INC Contr Bond Susp
  License 577154 · expires September 30, 2027
• GRAND SPACE CLEAR
  License 1075915 · expires May 31, 2027
• GREEN AIR & REFRIGERATION CLEAR
  License 839148 · expires June 30, 2027
• GREEN POINT CLEAR
  License 907419 · expires December 31, 2027
• GREGORY GEORGE SHOCKLEY CLEAR
  License 584514 · expires October 31, 2028
• H4 INVESTMENT INC CLEAR
  License 950924 · expires August 31, 2028
• HAITAO FENG CLEAR
  License 1061261 · expires December 31, 2027
• HAMMOND DRYWALL CONSTRUCTION CLEAR
  License 956694 · expires January 31, 2027
• HAMYA INC CLEAR
  License 1125118 · expires August 31, 2028
• HAOJIANG ZHENG CLEAR
  License 966894 · expires October 31, 2027
• HARDY LANDSCAPE CLEAR
  License 734646 · expires March 31, 2027
• HARDY LANDSCAPE CONSTRUCTION INC CLEAR
  License 905954 · expires November 30, 2027
• HENRY'S CUSTOM PAINTING CLEAR
  License 530987 · expires May 31, 2028
• HIGH NOON AIR CLEAR
  License 1085441 · expires December 31, 2027
• HJR CONTRACTING INC CLEAR
  License 1041548 · expires July 31, 2028
• HOFFICE BEAUTIFUL INC CLEAR
  License 965248 · expires September 30, 2027
• HOME BUILDERS INCORPORATED CLEAR
  License 1047096 · expires November 30, 2026
• HONEST PRO AIR CONDITIONING AND HEATING CLEAR
  License 1106190 · expires June 30, 2027
• HONG CONSTRUCTION CLEAR
  License 1142230 · expires August 31, 2027
• HONG DING CONSTRUCTION INC CLEAR
  License 1038313 · expires April 30, 2028
• HSU - DA WANG CLEAR
  License 712058 · expires August 31, 2027
• HSUEH YU LIAO CLEAR
  License 769733 · expires October 31, 2027
• HUAMEI CONSTRUCTION INC CLEAR
  License 1051093 · expires March 31, 2027
• I S FIREPRO CLEAR
  License 740006 · expires September 30, 2027
• ICE MAN POWER LLC CLEAR
  License 1158034 · expires July 31, 2028
• ICHIEN CHEN CLEAR
  License 1080792 · expires September 30, 2027
• IMPERIUM ROOFING INC CLEAR
  License 1141782 · expires August 31, 2027
• INTEGRATED WIRING CONCEPTS INC CLEAR
  License 1076152 · expires May 31, 2027
• ION SECURITY SYSTEMS CLEAR
  License 1015479 · expires June 30, 2028
• ISRE INTERACT SOLUTIONS REAL ESTATE CLEAR
  License 1066181 · expires June 30, 2028
• J H PLUMBING CLEAR
  License 876263 · expires April 30, 2028
• J L J CONSTRUCTION CLEAR
  License 817273 · expires August 31, 2028
• JAD MARBLE CLEAR
  License 1046344 · expires October 31, 2028
• JAE DO LEE CLEAR
  License 1140383 · expires July 31, 2027
• JAE H LIM CLEAR
  License 721424 · expires April 30, 2028
• JAMIE JINZUO HUANG CLEAR
  License 1055726 · expires July 31, 2027
• JAY ARORA CLEAR
  License 512179 · expires June 30, 2027
• JAY'S PLUMBING CLEAR
  License 622850 · expires July 31, 2027
• JH ADVANCED HVAC SOLUTIONS CLEAR
  License 1163754 · expires October 31, 2028
• JH BUILDER AND REMODELING INC Work Comp Susp
  License 751479 · expires June 30, 2027
• JIA XIAOLONG CLEAR
  License 1149248 · expires January 31, 2028
• JIANCAI CONSTRUCTION INC CLEAR
  License 1141118 · expires July 31, 2027
• JIFENG YAO CLEAR
  License 945757 · expires April 30, 2028
• JING Y ELECTRICAL SERVICES CLEAR
  License 1160291 · expires August 31, 2028
• JINHENG CONSTRUCTION ENGINEERING US A COMPANY Work Comp Susp
  License 1134197 · expires March 31, 2027

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