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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)

• #1 CALIFORNIA FLOORING INC Contr Bond Susp
  License 1115597 · expires January 31, 2028
• 4S EPOXY & POLISH CONCRETE INC CLEAR
  License 1122757 · expires June 30, 2028
• 8A CONSTRUCTION SERVICES INC CLEAR
  License 925552 · expires September 30, 2028
• A - C REGLAZING CLEAR
  License 927734 · expires January 31, 2027
• A - INDUSTRIAL DESIGN / BUILD CLEAR
  License 969373 · expires January 31, 2028
• A & SON'S CONCRETE INC CLEAR
  License 1158461 · expires July 31, 2028
• A 2 Z PLUMBING CLEAR
  License 1047486 · expires December 31, 2026
• A C SPRAGGINS ENGINEERING & UNDERGROUND INC CLEAR
  License 383440 · expires November 30, 2027
• A G HEATING & AIR CLEAR
  License 1132532 · expires February 28, 2027
• A I C INTERIOR INC CLEAR
  License 806562 · expires September 30, 2028
• A T S CONSTRUCTION CLEAR
  License 807837 · expires May 31, 2028
• A-1 DELIVERY CO CLEAR
  License 971377 · expires March 31, 2028
• A&J INTERNATIONAL LLC DBA FAIRWAY SHUTTERS CLEAR
  License 1123081 · expires July 31, 2028
• A&L SYSTEMS LLC CLEAR
  License 1159202 · expires August 31, 2028
• A2Z BUILDERS GROUP INC CLEAR
  License 1150914 · expires February 29, 2028
• AA HVAC INC CLEAR
  License 1057513 · expires August 31, 2027
• AAG PUMP SERVICES CLEAR
  License 1067678 · expires August 31, 2028
• ABBA COMMUNICATIONS CLEAR
  License 777384 · expires April 30, 2028
• ABC RESOURCES INC CLEAR
  License 538680 · expires August 31, 2028
• ABL CONTRACTING INC CLEAR
  License 1126537 · expires September 30, 2028
• ABLE ELECTRIC CLEAR
  License 766137 · expires February 29, 2028
• ABM ELECTRICAL POWER SERVICES LLC CLEAR
  License 989000 · expires December 31, 2027
• ABOVEGROUND SOLUTIONS INC CLEAR
  License 1106979 · expires July 31, 2027
• ABSOLUTE FACILITY CONTROL INC Contr Bond Susp
  License 796155 · expires August 31, 2027
• AC POWER 1 INC CLEAR
  License 1018955 · expires October 31, 2028
• ACE ENGINEERING INC CLEAR
  License 613320 · expires February 28, 2027
• ACES CONSTRUCTION CLEAR
  License 1083500 · expires November 30, 2027
• ACOSTA PIPELINE INC CLEAR
  License 1064810 · expires April 30, 2028
• ACTION RESTORATION CLEAR
  License 798665 · expires August 31, 2027
• ADAPTIVE CONTROLS SERVICES CLEAR
  License 1116142 · expires February 29, 2028
• ADVANCE CONSTRUCTION CLEAR
  License 842289 · expires May 31, 2027
• ADVANCED ELECTRICAL INNOVATIONS CLEAR
  License 856385 · expires March 31, 2027
• ADVANCED MONITORING INC CLEAR
  License 1035016 · expires January 31, 2028
• ADVANCED TECHNOLOGY INC CLEAR
  License 1064615 · expires March 31, 2028
• ADVANCO FIRE PROTECTION INC CLEAR
  License 631600 · expires November 30, 2027
• AFFORDABLE SERVICES CLEAR
  License 857640 · expires April 30, 2027
• AG BUILDING AND REMODELING INC CLEAR
  License 1153779 · expires April 30, 2028
• AGILITY INTEGRATION CORPORATION CLEAR
  License 804121 · expires February 29, 2028
• AGUILAR TREE SERVICE LLC CLEAR
  License 1161273 · expires September 30, 2028
• AHOME CONSTRUCTION INC CLEAR
  License 1066852 · expires July 31, 2028
• AIR BEE HVAC CLEAR
  License 1158451 · expires July 31, 2028
• AIR CONTROL SPECIALTIES INC CLEAR
  License 570881 · expires March 31, 2027
• AIR CONTROL SYSTEMS INC CLEAR
  License 639003 · expires March 31, 2028
• AIRITE HEATING AND AIR CONDITIONING INC CLEAR
  License 232930 · expires October 31, 2028
• AIRTONG HEATING & COOLING CLEAR
  License 991016 · expires March 31, 2028
• AJ CLAREMONT STRUCTURAL STEEL FAB INC Work Comp Susp
  License 1137486 · expires May 31, 2027
• AJB CONCRETE & MASONRY CONSTRUCTION CLEAR
  License 463690 · expires October 31, 2027
• AL CONSTRUCTION & DESIGN CLEAR
  License 1161927 · expires September 30, 2028
• ALBERTO GARCIA CONSTRUCTION SERVICES INC DBA A G CONSTRUCTION CLEAR
  License 793245 · expires April 30, 2027
• ALBERTO GARCIA CONTRACTOR CLEAR
  License 624340 · expires August 31, 2027

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