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)
- LEE'S GENERAL CONSTRUCTION CORP CLEAR
- LEGEND CONSTRUCTION SERVICES INC CLEAR
- LEO HAO LIU CLEAR
- LEOTHACUE ENTERPRISES INC CLEAR
- LIFE BUILDERS CLEAR
- LIGHTHOUSE CONSTRUCTION & REMODEL CLEAR
- LINX CONSTRUCTION INC CLEAR
- LIONEL RODIRGUEZ CLEAR
- LLOYD ELECTRIC CLEAR
- LOS ANGELES FENCING CO CLEAR
- LOS SERRANO CONSTRUCTION CLEAR
- LOUIE THE POOL TECHNICIAN CLEAR
- LOUIS JOSEPH ENRIQUEZ CLEAR
- LOW VOLT INC CLEAR
- LOZANO MARBLE GRANITE & TILE CLEAR
- LR MASONRY INC CLEAR
- LS CONSTRUCTION CLEAR
- LS RACK INC CLEAR
- LSSI LLC CLEAR
- LUCIO'S LANDSCAPING INC CLEAR
- LUEVANO ELECTRIC LLC CLEAR
- LUIS DRYWALL CLEAR
- LUIS M CARDENAS Contr Bond Susp
- LUISA MARGARITA JIMENEZ HERRERA CLEAR
- LUJANO ELECTRIC CLEAR
- LUNA'S GARAGE DOORS INC CLEAR
- LUXEDGE ELECTRIC CLEAR
- LVL CONSTRUCTION INC CLEAR
- LVL UP PLUMBING INC CLEAR
- LYDEN ELECTRIC CLEAR
- LYTLE LANDSCAPE CONSTRUCTION CLEAR
- M & R CONSTRUCTION SERVICES INC CLEAR
- M A C METAL SYSTEMS SERVICES CLEAR
- M C R MASONRY CO Work Comp Susp
- M J PACIFIC INC CLEAR
- MACIAS GARDENING AND DESIGN CLEAR
- MAGNISON AND MOEN INC CLEAR
- MALDONADO INDUSTRIES CLEAR
- MANA CONCRETE CLEAR
- MAPLE TREE SERVICE CLEAR
- MARCO A YANEZ CLEAR
- MARCOS AIR CONDITIONING CLEAR
- MARDONA SHENOUDA CONSTRUCTION BUILDER CLEAR
- MARK ALAN GILBERTSON CLEAR
- MARK LIGTENBERG CLEAR
- MARLU CONSTRUCTION CLEAR
- MARQUEZ IRON INC CLEAR
- MARTIN CERVANTES CLEAR
- MARTIN REMODELING Contr Bond Susp
- MARTIN ROBLES GARCIA CLEAR
Page 11 of 19 · ← Previous · Next →