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

Plumbers in Diamond Bar, CA

29 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 1–20How results are ordered
01

A E D Contractors

Diamond Bar, CA · (909) 374-2597

CA-CSLB 441036 · A B +2General engineering contractorGeneral contractorElectrician+1
License activechecked Oct 24, 2026
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02

Ace Plumbing Co

Diamond Bar, CA · (909) 973-0227

CA-CSLB 785570 · B C36General contractorPlumber
License activechecked Oct 24, 2026
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07

Aveo Inc

Diamond Bar, CA · (909) 538-9188

CA-CSLB 969881 · A B +3General engineering contractorGeneral contractorElectrician+2
License activechecked Oct 24, 2026
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09

Cal Steam Company

Diamond Bar, CA · (213) 798-4693

CA-CSLB 674646 · C4 C20 +1PlumberHeating and air conditioning
License activechecked Oct 24, 2026
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11

Chien Ming Chu Chen

Diamond Bar, CA · (626) 705-7227

CA-CSLB 820540 · B C10 +1General contractorElectricianPlumber
License activechecked Oct 24, 2026
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13

Elite Pipe P

Diamond Bar, CA · (626) 392-3916

CA-CSLB 1144688 · C36Plumber
License activechecked Oct 24, 2026
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16

G C Plumbing

Diamond Bar, CA · (714) 342-1884

CA-CSLB 681446 · C36Plumber
License activechecked Oct 24, 2026
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18

J H Plumbing

Diamond Bar, CA · (310) 738-8514

CA-CSLB 876263 · C36Plumber
License activechecked Oct 24, 2026
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