NAICS 238220 · Plumbing, Heating, and Air-Conditioning Contractors

Plumbers in Ontario, CA

49 licensed plumbers · every license checked against the issuer's file

More cities in California

Los Angeles 651San Diego 494San Francisco 437San Jose 384Sacramento 242Riverside 208Bakersfield 191Anaheim 181Santa Rosa 157Glendale 156Long Beach 145Fresno 143Van Nuys 134El Cajon 133Escondido 128Oakland 128
Listings 21–40How results are ordered
28

Continental Plumbing Inc

Mira Loma, CA · (951) 360-8300

CA-CSLB 399073 · C4 C16 +3PlumberFire sprinkler contractorGeneral engineering contractor+1
License activechecked Oct 24, 2026
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33

Cryoworks Inc

Jurupa Valley, CA · (951) 965-0136

CA-CSLB 949419 · C36Plumber
License activechecked Oct 24, 2026
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34

D I Plumbing

Fontana, CA · (909) 374-0264

CA-CSLB 980116 · C36Plumber
License activechecked Oct 24, 2026
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38

David H Wu

Eastvale, CA · (626) 227-3457

CA-CSLB 1051101 · C10 C36ElectricianPlumber
License activechecked Oct 24, 2026
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