Home / California / Ontario
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)
- SANTOYO CONSTRUCTION CLEAR
- SCORPION REMODELING CONSULTING DBA UNITED WATER RESTORATION CLEAR
- SENOR SEPTIC CONSTRUCTION & PUMPING CLEAR
- SENOR SEPTIC CONSTRUCTION AND PUMPING INC CLEAR
- SHAMROCK LANDSCAPE & MAINTENANCE CLEAR
- SHARK GENERAL BUILDING INC CLEAR
- SHENGYU LIU CONSTRUCTION CLEAR
- SHEPPARD'S COATINGS CLEAR
- SHOWCASE FACILITY SOLUTIONS INC CLEAR
- SHOWTIME FAMILY PLUMBING & ROOTER INC CLEAR
- SIERRA CONSTRUCTION CLEAR
- SIGN CITY CLEAR
- SIGN INDUSTRIES INC CLEAR
- SIGNARAMA ONTARIO CLEAR
- SIGNATURE SIGNS CLEAR
- SIGNS OF SUCCESS CLEAR
- SIGNUM LUX CORP CLEAR
- SILVER LINE FRAMING CLEAR
- SIMINGTON PAINTING COMPANY CLEAR
- SIMPLE BUILDS Cit Entity Susp
- SIMPLE RESTORATION INC CLEAR
- SINGULARITY CONSTRUCTION INC CLEAR
- SITELOGIQ INC CLEAR
- SKY COLOR PAINTING INC CLEAR
- SKYLINE SERVICES LLC CLEAR
- SKYLINECRAFT CONSTRUCTION INC CLEAR
- SM WATERWORKS BACKFLOW SERVICE CLEAR
- SMITH BROTHERS GLASS INC CLEAR
- SO-CAL SHOWERDOORS CLEAR
- SOLAR ELECTRICAL PLUS INC CLEAR
- SOLAR PRO ELECTRICAL SOLUTION INC CLEAR
- SOLGAR CONSTRUCTION INC CLEAR
- SOLID DRYWALL WORKS INC CLEAR
- SOLID INTEGRITY CONSTRUCTION CLEAR
- SOLIS ALARM SYSTEMS Contr Bond Susp
- SOLORIO CONSTRUCTION CLEAR
- SOUTHERN LIGHT ELECTRIC Contr Bond Susp
- SOUTHLAND FIRE PROTECTION CO CLEAR
- SPEC CONSTRUCTION & DEVELOPMENT INC CLEAR
- SPEC CONSTRUCTION CO INC CLEAR
- SPECIALIZED DAIRY SERVICE INC CLEAR
- SPICER CONSTRUCTION CLEAR
- SPLASH PAINTING CALIFORNIA LLC CLEAR
- STANGER CONSTRUCTION AND REMODEL CLEAR
- STAR HARDWARE INC CLEAR
- STEEL DESIGN BUILDERS INC CLEAR
- STEVE CROSSMAN CLEAR
- STEVE HONG CLEAR
- STEVEN ELLIOTT CONSTRUCTION CLEAR
- STEVEN ROY TULLOS CLEAR
Page 16 of 19 · ← Previous · Next →