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

Fire sprinkler contractors in Diamond Bar, CA

5 licensed fire sprinkler contractors · every license checked against the issuer's file

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552 listingsHow results are ordered
22

Koung Mark Pao-Feng

Hacienda Heights, CA · (626) 330-0119

CA-CSLB 832380 · B C7 +2General contractorElectricianFire sprinkler contractor
License activechecked Oct 24, 2026
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24

Liang Weisong

West Covina, CA · (626) 708-1550

CA-CSLB 1040694 · C16Fire sprinkler contractor
License activechecked Oct 24, 2026
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26

Meterman Services Inc

Fullerton, CA · (714) 680-8601

CA-CSLB 902074 · B C6 +3General contractorCarpenterElectrician+2
License activechecked Oct 24, 2026
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27

Mtm Construction Inc

City of Industry, CA · (626) 934-1112

CA-CSLB 659142 · A B +6General engineering contractorGeneral contractorElectrician+2
License activechecked Oct 24, 2026
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28

Nebshau Inc

Covina, CA · (626) 332-7066

CA-CSLB 1064967 · C16Fire sprinkler contractor
License activechecked Oct 24, 2026
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29

Ortiz Fire

City of Industry, CA · (626) 330-9819

CA-CSLB 906038 · C16Fire sprinkler contractor
License activechecked Oct 24, 2026
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31

Royaltech Services

LA Puente, CA · (626) 333-0333

CA-CSLB 638729 · A B +6General engineering contractorGeneral contractorElectrician+2
License activechecked Oct 24, 2026
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39

Torres Wilfredo

Montclair, CA · (909) 772-0271

CA-CSLB 818886 · B C16 +1General contractorFire sprinkler contractorPlumber
License activechecked Oct 24, 2026
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