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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)
- PI WALLCOVERING CLEAR
- PINZE ZHANG CLEAR
- PISCES PLUMBING CLEAR
- PIT STOP SERVICE AND REPAIR CLEAR
- PLATINUM GLASS CORPORATION CLEAR
- PONA'S CONSTRUCTION CLEAR
- POWER GRADE INC CLEAR
- POWERHOUSE GRADING INC CLEAR
- PRACTICORE SOLUTIONS INC CLEAR
- PREFAB GRANITE & TILE DEPOT INC CLEAR
- PREMIER DRYWALL CLEAR
- PREMIER PAVING INC CLEAR
- PREMIER POOLS AND SPAS CLEAR
- PREMIUM CARPET INSTALLATION Contr Bond Susp
- PREMIUM FLOOR COVERING INC CLEAR
- PRIMARY LANDSCAPE INC CLEAR
- PRIME CONSTRUCTION SERVICES INC CLEAR
- PRIME LINE STRIPING CLEAR
- PRIME RENOVATE INC CLEAR
- PRIMEBORE DIRECTIONAL BORING CORP CLEAR
- PRISTINE PAINTING & DECOR INC CLEAR
- PRO INSULATION INC CLEAR
- PRO KITCHEN CABINETS CLEAR
- PRO QUALITY FENCE INC CLEAR
- PRO RACKING SYSTEMS CORP CLEAR
- PRO ROOTER GUYS INC CLEAR
- PRO SOURCE PAINTING CLEAR
- PRO TECH PLUMBING CLEAR
- PROFFITT EXCAVATING INC CLEAR
- PROGRESSIVE FUELING CONSTRUCTION INC CLEAR
- PROJECT COUNTERTOPS COMPANY INC CLEAR
- PROJECT X DEVELOPER INC CLEAR
- PROMINENT CONTRACTING FLOOR COVERING CLEAR
- PROPERTY BUILDERS CONCEPTS & MAINTENANCE INC CLEAR
- PROPERTY MANAGEMENT SERVICE CLEAR
- PUENTE ELECTRIC CLEAR
- Q A T GENERAL CONSTRUCTION CLEAR
- QUALITY CONSTRUCTION & REPAIR SERVICES CLEAR
- QUALITY FRAMING JC INC CLEAR
- R & B WHOLESALE DISTRIBUTORS LLC CLEAR
- R & G STAIRS & MILLWORK CO CLEAR
- R & S OVERHEAD DOORS OF INLAND EMPIRE INC CLEAR
- R A DARRACQ CONCRETE CLEAR
- R B M LOCK & KEY SERVICE CLEAR
- R C A CONSTRUCTION CLEAN UP INC CLEAR
- R D K ELECTRIC CLEAR
- R J P GENERAL CONTRACTING CLEAR
- R W NOLTE CONSTRUCTION INC CLEAR
- R3 PAINTING CLEAR
- RAD SERVICES INC CLEAR
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