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Contractor license records in Ontario, CA

918 records with Ontario 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 Ontario

General Building (338) · Electrical (137) · General Engineering (61) · Warm-Air Heating, Ventilating and Air-Conditioning (51) · Painting and Decorating (50) · Plumbing (49) · Low Voltage Systems (36) · Landscaping (34) · Concrete (32) · Flooring and Floor Covering (32) · Roofing (26) · Cabinet, Millwork and Finish Carpentry (22) · Doors, Gates and Activating Devices (22) · Glazing (21) · Drywall (20) · Ceramic and Mosaic Tile (18) · Synthetic Products (17) · Swimming Pool (16) · Masonry (16) · Structural Steel (13) · Fire Protection (12) · Refrigeration (12) · Building Moving/Demolition (12) · Pool and Spa Maintenance (11) · Window Coverings (9) · Sanitation System (9) · Prefabricated Equipment (9) · Lathing and Plastering (9) · Earthwork and Paving (8) · Metal Products (8) · Parking and Highway Improvement (7) · Sign (7) · Reinforcing Steel (7) · Machinery and Pumps (7) · Concrete-Related Services (7) · Hazardous Substance Removal Certification (6) · Ornamental Metal (6) · Fencing (5) · Service Station Equipment and Maintenance (5) · Sheet Metal (5) · Welding (5) · Framing and Rough Carpentry (4) · Construction Cleanup (4) · Tree Service (4) · Residential Remodeling (4) · Non-Electrical Sign Installation (3) · Solar (3) · Non-specialized (3) · Asbestos Certification (3) · Asbestos Abatement (3) · Tree and Palm (3) · Paperhanging (2) · Awnings (2) · Construction Zone Traffic Control (2) · Boiler, Hot-Water Heating and Steam Fitting (2) · Pipeline (2) · Insulation and Acoustical (2) · General Manufactured Housing (1) · Suspended Ceilings (1) · Well Drilling (1) · Lock and Security Equipment (1) · Hardware, Locks and Safes (1) · Safes and Vaults (1) · Siding and Decking (1) · Scaffolding (1)

• ALC ROOFING CLEAR
  License 1148910 · expires January 31, 2028
• ALEX ELECTRICAL SERVICES INC CLEAR
  License 1061425 · expires October 31, 2028
• ALEXANDER INSTALLATION & TECHNOLOGY SERVICES LLC EMP/WK Bnd Susp
  License 1060170 · expires November 30, 2027
• ALEXANDRU LAPOS CLEAR
  License 828822 · expires December 31, 2027
• ALFA POWER ELECTRIC CLEAR
  License 1142958 · expires September 30, 2027
• ALFONSO GONZALEZ JR CLEAR
  License 1132020 · expires January 31, 2027
• ALJOHN BUILDERS CLEAR
  License 616383 · expires March 31, 2027
• ALL - RIGHT ROOFING LLC CLEAR
  License 726974 · expires July 31, 2027
• ALL COAST EPOXY LLC CLEAR
  License 1075287 · expires December 31, 2027
• ALL FINISH COATING INC CLEAR
  License 1104874 · expires May 31, 2027
• ALL PRO COOLING HEATING PLUMBING & ELECTRICAL CLEAR
  License 1103983 · expires April 30, 2027
• ALL TECH COMMERCIAL POOL SERVICE & REPAIR CLEAR
  License 1152862 · expires April 30, 2028
• ALL TRADE DECKING CLEAR
  License 708790 · expires June 30, 2027
• ALLIANCE COMMUNICATION SERVICES INC CLEAR
  License 746796 · expires April 30, 2027
• ALLSTAR ADU & GENERAL BUILDER CLEAR
  License 1009628 · expires December 31, 2027
• ALLWAYSS CLEAR
  License 1088428 · expires March 31, 2028
• ALPHA DRYWALL CLEAR
  License 1059437 · expires October 31, 2027
• ALPHA OMEGA PLUMBING CLEAR
  License 977823 · expires November 30, 2027
• ALVARADO DRYWALL INC CLEAR
  License 1038530 · expires May 31, 2028
• AMERICAN GENERAL BUILDERS CLEAR
  License 1114159 · expires December 31, 2027
• AMERICAN JETTING SERVICES INC CLEAR
  License 845651 · expires August 31, 2028
• AMERICAN STAINLESS CLEAR
  License 1085845 · expires January 31, 2028
• AMILCAR M CASTILLO CLEAR
  License 711675 · expires April 30, 2027
• AMINS CONSTRUCTION INC CLEAR
  License 1149094 · expires January 31, 2028
• AMJ MECHANICAL CLEAR
  License 1031031 · expires September 30, 2027
• ANDA CLEAR
  License 1032575 · expires November 30, 2027
• ANDRADE PAINTING & DECORATING CLEAR
  License 462142 · expires February 28, 2027
• ANDREW GEORGE TURNER CLEAR
  License 1046234 · expires October 31, 2028
• ANNA EARLEY DBA EPOXY CONSTRUCTION SERVICES CLEAR
  License 721740 · expires April 30, 2028
• ANSARY ABOUBAKARE CLEAR
  License 1042235 · expires July 31, 2028
• ANTON CONSTRUCTION CLEAR
  License 461541 · expires January 31, 2027
• ANY COLOR YOU LIKE PAINT CO CLEAR
  License 1117517 · expires March 31, 2028
• AP CONCRETE CLEAR
  License 1163175 · expires October 31, 2028
• APEX CONCRETE CLEAR
  License 1135754 · expires April 30, 2027
• ARANDA'S SANITATION SYSTEMS CLEAR
  License 1053122 · expires May 31, 2027
• ARC ELECTRICAL CONTRACTORS INC CLEAR
  License 1085957 · expires August 31, 2028
• ARCO GLASS PLUS INC CLEAR
  License 1087211 · expires February 29, 2028
• ARENA CONSTRUCTION CLEANUP CLEAR
  License 1037475 · expires March 31, 2028
• ARIAS ELECTRICAL SERVICES CLEAR
  License 1005100 · expires December 31, 2027
• ARIJET CORPORATION CLEAR
  License 916562 · expires June 30, 2028
• ARTISAN CONSTRUCTION CLEAR
  License 1087835 · expires February 29, 2028
• ASHKA DESIGN & CONSTRUCTION CLEAR
  License 1145356 · expires October 31, 2027
• ASTERA KITCHEN AND BATH CABINETS CLEAR
  License 1134637 · expires March 31, 2027
• ATLANTIC REFRIGERATION & APPLIANCES Work Comp Susp
  License 662919 · expires January 31, 2027
• AUSTIN/JONES CORP CLEAR
  License 656299 · expires October 31, 2028
• AVAIL ELECTRICAL SERVICES LLC Liab Ins Susp
  License 1048984 · expires July 31, 2028
• AXXESS DOOR CORP CLEAR
  License 999754 · expires January 31, 2027
• B & M ROOFING STRIPPING SERVICES CLEAR
  License 626422 · expires January 31, 2027
• B FRIES CONSTRUCTION INC CLEAR
  License 735157 · expires June 30, 2028
• B Z B CONSTRUCTION COMPANY CLEAR
  License 599680 · expires August 31, 2028

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