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
41

Tyler Stevens

Fullerton, CA · (714) 870-7117

CA-CSLB 671757 · B C16 +1General contractorFire sprinkler contractorPlumber
License activechecked Oct 24, 2026
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46

Valley Plumbing

Covina, CA · (661) 809-2903

CA-CSLB 408122 · C4 C16 +1PlumberFire sprinkler contractor
License activechecked Oct 24, 2026
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50

Yun Qi Construction

Rowland Heights, CA · (626) 780-2806

CA-CSLB 856012 · B C16General contractorFire sprinkler contractor
License activechecked Oct 24, 2026
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58

Ateck Construction Inc

Chino, CA · (909) 393-9798

CA-CSLB 845160 · B C10 +2General contractorElectricianFire sprinkler contractor+1
License activechecked Oct 24, 2026
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60

Axis Mechanical Services

Anaheim, CA · (714) 398-8322

CA-CSLB 924887 · B C16 +2General contractorFire sprinkler contractorPlumber+1
License activechecked Oct 24, 2026
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