NAICS 238120 · Structural Steel and Precast Concrete Contractors

Steel and welding contractors in Ontario, CA

34 licensed steel and welding contractors · every license checked against the issuer's file

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798 listingsHow results are ordered
01

A M F I

Ontario, CA · (909) 287-3030

CA-CSLB 800845 · D21 D24Specialty contractorSteel and welding contractor
License activechecked Oct 24, 2026
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02

American Stainless

Ontario, CA · (909) 257-5747

CA-CSLB 1085845 · C43 D12 +2Heating and air conditioningSpecialty contractorSteel and welding contractor
License activechecked Oct 24, 2026
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03

Designer Works

Ontario, CA · (909) 947-5777

CA-CSLB 986451 · B C23 +1General contractorSteel and welding contractor
License activechecked Oct 24, 2026
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04

Drf Rebar

Ontario, CA · (951) 206-0189

CA-CSLB 1146594 · C50Steel and welding contractor
License activechecked Oct 24, 2026
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05

Fresno Shower Door Inc

Ontario, CA · (909) 605-6468

CA-CSLB 986239 · C17 D24 +1Glass and window contractorSteel and welding contractorSpecialty contractor
License activechecked Oct 24, 2026
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08

Herwehe Timothy F

Ontario, CA · (909) 984-7199

CA-CSLB 576432 · C50Steel and welding contractor
License activechecked Oct 24, 2026
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10

Impact Welding

Ontario, CA · (909) 530-8010

CA-CSLB 1155143 · C60Steel and welding contractor
License activechecked Oct 24, 2026
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11

Jesse's Iron Works

Ontario, CA · (909) 633-7218

CA-CSLB 792073 · B C23General contractorSteel and welding contractor
License activechecked Oct 24, 2026
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14

K P Construction Co Inc

Ontario, CA · (909) 331-7674

CA-CSLB 790555 · B C8 +1General contractorConcrete contractorSteel and welding contractor
License activechecked Oct 24, 2026
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15

Kennedy Steel

Ontario, CA · (562) 350-4133

CA-CSLB 1086611 · C51Steel and welding contractor
License activechecked Oct 24, 2026
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16

Kp Builders

Ontario, CA · (909) 331-7674

CA-CSLB 983861 · B C51General contractorSteel and welding contractor
License activechecked Oct 24, 2026
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18

L M I

Ontario, CA · (909) 605-6468

CA-CSLB 471010 · C17 D24 +1Glass and window contractorSteel and welding contractorSpecialty contractor
License activechecked Oct 24, 2026
CallDetails