NAICS 238990 · All Other Specialty Trade Contractors

Specialty contractors in Ontario, CA

74 licensed specialty contractors · every license checked against the issuer's file

More cities in California

San Diego 337Sacramento 238San Jose 225Los Angeles 184Bakersfield 174Riverside 174Anaheim 163Fresno 151San Francisco 111Corona 95Orange 94Santa Ana 94Irvine 78Escondido 75Chula Vista 74Hayward 73
Listings 1–20How results are ordered
01

2R Drilling Inc

Ontario, CA

US-GSA-SAM H65LR6K6HER5Specialty contractor
License activechecked Oct 23, 2026
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02

A-1 Delivery Co

Ontario, CA · (909) 444-1220

CA-CSLB 971377 · D34Specialty contractor
License activechecked Oct 19, 2026
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04

A - C Reglazing

Ontario, CA · (909) 973-0988

CA-CSLB 927734 · D12Specialty contractor
License activechecked Oct 19, 2026
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05

A M F I

Ontario, CA · (909) 287-3030

CA-CSLB 800845 · D21 D24Specialty contractorSteel and welding contractor
License activechecked Oct 19, 2026
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06

Affordable Services

Ontario, CA · (562) 694-2449

CA-CSLB 857640 · C21 D06 +2Excavation, grading and pavingConcrete contractorTree service+1
License activechecked Oct 19, 2026
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07

All Trade Decking

Ontario, CA · (909) 843-7219

CA-CSLB 708790 · D12 D41Specialty contractorCarpenter
License activechecked Oct 19, 2026
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08

American Stainless

Ontario, CA · (909) 257-5747

CA-CSLB 1085845 · C43 D12 +2Heating and air conditioningSpecialty contractorSteel and welding contractor
License activechecked Oct 19, 2026
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10

Axxess Door Corp

Ontario, CA · (909) 206-1400

CA-CSLB 999754 · C17 D28Glass and window contractorSpecialty contractor
License activechecked Oct 19, 2026
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12

Big O Flooring Inc

Ontario, CA · (909) 757-2024

CA-CSLB 1093946 · C15 D12Flooring contractorSpecialty contractor
License activechecked Oct 19, 2026
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16

Castle Contractor

Ontario, CA · (951) 303-6208

CA-CSLB 933993 · C10 D28 +1ElectricianSpecialty contractorSwimming pool contractor
License activechecked Oct 19, 2026
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18

Collins Company

Ontario, CA · (909) 548-6708

CA-CSLB 715532 · D03 D64Specialty contractor
License activechecked Oct 19, 2026
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