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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)
- CUSTOM DRYWALL SPECIALISTS INC CLEAR
- CUSTOM HOMES CONTRACTOR DBA CUSTOM HOMES CONSTRUCTION CLEAR
- CUSTOM PROFESSIONAL ELECTRONICS INC CLEAR
- D & D CONTRACTORS INC CLEAR
- D A PAINTING CLEAR
- D M GORDER CONSTRUCTION CO CLEAR
- D S S CLEAR
- DANCO TILE WORKS CLEAR
- DANNY O'DELL FLOOR COVERING CLEAR
- DAO LE CLEAR
- DAS COMMERICAL OPENINGS INC CLEAR
- DAVE JOHNSON PAINTING CLEAR
- DAVID GRAY CLEAR
- DAVID LEUNG CLEAR
- DAVINSON PORTO CLEAR
- DAVIS MOBILE HOME SERVICES CLEAR
- DAYLIGHT SOLAR ENERGY CORP CLEAR
- DB CONSTRUCTION INC CLEAR
- DC2 CONSTRUCTION CLEAR
- DCHRISTJAN FINE CABINETRY CLEAR
- DDL CONSTRUCTION INC CLEAR
- DDPT INC CLEAR
- DE LUNA FRAMING Contr Bond Susp
- DEEPOOLS SERVICE & REPAIRS CLEAR
- DEER CANYON ELECTRIC INC CLEAR
- DEES BURKE ENGINEERING CONSTRUCTORS LLC CLEAR
- DEL MAR FLOOR COVERING INC CLEAR
- DELTA ENERGY ELECTRICAL SOLUTION CLEAR
- DELTA GROUP INC CLEAR
- DESIGN WINDOWS & DOORS INC CLEAR
- DESIGNER WORKS CLEAR
- DESSA ELECTRIC COMPANY CLEAR
- DEVINE LOOKS HOME DESIGN & CONSTRUCTION CLEAR
- DGI STRUCTURES INC CLEAR
- DH REMODEL & CONSTRUCTION INC CLEAR
- DI SHAO CONSTRUCTION CLEAR
- DIAMOND AIR SERVICES INC CLEAR
- DIAMOND WEST BUILDERS CLEAR
- DIGITAL TECHNOLOGIES INC CLEAR
- DIVERSIFAB INC CLEAR
- DIVINE POOLS CO CLEAR
- DMG FIRE PROTECTION CLEAR
- DOJA INC CLEAR
- DOT MILLWORK CLEAR
- DOUMA CONCRETE CLEAR
- DRAPER PROPERTIES CLEAR
- DRF REBAR CLEAR
- DS HVAC INC CLEAR
- DSA FLOORING LLC CLEAR
- DSS HIGH PERFORMANCE HVAC SOLUTIONS CLEAR
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