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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)

• MARTINEZ STEEL CORPORATION CLEAR
  License 708227 · expires June 30, 2027
• MARTINEZ STEEL LLC CLEAR
  License 1050623 · expires February 28, 2027
• MASONRY ARENA CLEAR
  License 1115861 · expires January 31, 2028
• MASTER BUILDING SPECIALTIES INC CLEAR
  License 616533 · expires February 28, 2027
• MASTER CHILL HEATING AND AIR CLEAR
  License 1138989 · expires June 30, 2027
• MATTHEW RAMIREZ Contr Bond Susp
  License 1060845 · expires November 30, 2027
• MC GHEE CONSTRUCTION INC CLEAR
  License 884036 · expires September 30, 2028
• MC GINNIS CUSTOM PLASTICS CLEAR
  License 326086 · expires April 30, 2028
• MCINTYRE METAL DECKING CLEAR
  License 1078212 · expires July 31, 2027
• MCQ CONSTRUCTION INC CLEAR
  License 1132913 · expires February 28, 2027
• MEGA CONSTRUCTION LLC CLEAR
  License 1132714 · expires February 28, 2027
• MEHDI JABER CLEAR
  License 1034053 · expires December 31, 2027
• MELENDEZ TREE SERVICE CLEAR
  License 1073751 · expires March 31, 2027
• MENDEZ CABINETS CLEAR
  License 1147647 · expires December 31, 2027
• MENDOZA HOME REMODELING CLEAR
  License 1111722 · expires October 31, 2027
• META GROUP BUILDER Contr Bond Susp
  License 1108241 · expires August 31, 2027
• METAL ENGINEERING & MFG CLEAR
  License 409730 · expires July 31, 2027
• METRO RF SERVICES INC CLEAR
  License 895236 · expires April 30, 2027
• MICHAEL ANTHONY PAINTING CLEAR
  License 731128 · expires January 31, 2027
• MICHAEL CRAIG JONES CLEAR
  License 790999 · expires February 28, 2027
• MICHAEL ELECTRIC CLEAR
  License 1133177 · expires February 28, 2027
• MICHAEL WOODFLOOR INC CLEAR
  License 1147166 · expires January 31, 2028
• MIDAS ROOFING INC CLEAR
  License 1124814 · expires August 31, 2028
• MIKE WALSH DBA A-C POWER SYSTEMS CLEAR
  License 514277 · expires July 31, 2027
• MINGHUI LI CLEAR
  License 1028942 · expires July 31, 2028
• ML ELECTRIC CLEAR
  License 1157253 · expires June 30, 2028
• MODERN METAL Work Comp Susp
  License 763253 · expires August 31, 2027
• MODESTO GUDINO DBA BEST LANDSCAPING CLEAR
  License 781626 · expires July 31, 2028
• MOE'S CONCRETE CLEAR
  License 1090844 · expires April 30, 2028
• MOONLITE CONSTRUCTION CLEAR
  License 995505 · expires August 31, 2028
• MOORE UNITED CONSTRUCTION INC CLEAR
  License 764972 · expires August 31, 2027
• MORA-DATA & TELECOM SERVICES CLEAR
  License 1058928 · expires October 31, 2027
• MORENO'S CONSTRUCTION INC CLEAR
  License 1095952 · expires August 31, 2028
• MR ELECTRIC OF ONTARIO CLEAR
  License 1102719 · expires March 31, 2027
• MURGUIA CONSTRUCTION CLEAR
  License 780053 · expires June 30, 2028
• MURGUIA CONSTRUCTION INC CLEAR
  License 766953 · expires August 31, 2027
• MUSTANG CONSTRUCTION CLEAR
  License 1020934 · expires November 30, 2026
• MVE ELECTRIC INC CLEAR
  License 1151112 · expires February 29, 2028
• MW ENERGY LLC CLEAR
  License 1146182 · expires November 30, 2027
• MYCO CONSTRUCTION CLEAR
  License 853581 · expires November 30, 2027
• MYERS POWER PRODUCTS INC CLEAR
  License 1009858 · expires December 31, 2027
• NAVA DRYWALL CLEAR
  License 1095014 · expires August 31, 2028
• NAVARRO PAINTING CLEAR
  License 1154283 · expires April 30, 2028
• NAVONA PLACEMAKING CLEAR
  License 1156579 · expires June 30, 2028
• NC DRYWALL INTERIORS Contr Bond Susp
  License 1131589 · expires January 31, 2027
• NEFF CONSTRUCTION INC CLEAR
  License 790576 · expires January 31, 2027
• NELISSEN PLUMBING CLEAR
  License 1142166 · expires August 31, 2027
• NEW ALLIANCE FRAMING CLEAR
  License 1028481 · expires June 30, 2027
• NEW CONSTRUCTON CLEAR
  License 532419 · expires June 30, 2028
• NEW LIFE PAINTING CLEAR
  License 1061980 · expires January 31, 2028

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