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
05

Galvan Carlos X

Yorba Linda, CA · (714) 397-3816

CA-CSLB 654951 · B C10 +1General contractorElectricianFire sprinkler contractor
License activechecked Oct 24, 2026
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09

Harry Pro Services

Fullerton, CA · (714) 240-0500

CA-CSLB 764272 · B C4 +7General contractorPlumberElectrician+2
License activechecked Oct 24, 2026
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12

Huante Mike L Jr

Hacienda Heights, CA · (323) 864-3238

CA-CSLB 676834 · C16Fire sprinkler contractor
License activechecked Oct 24, 2026
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13

Hydrant Flow Inc

Yorba Linda, CA · (949) 403-1033

CA-CSLB 1138653 · C16Fire sprinkler contractor
License activechecked Oct 24, 2026
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14

Impact Modular Builders

Yorba Linda, CA · (949) 885-6916

CA-CSLB 1099163 · B C16General contractorFire sprinkler contractor
License activechecked Oct 24, 2026
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18

Jn Construction Inc

Ontario, CA · (323) 378-0109

CA-CSLB 1001396 · A B +4General engineering contractorGeneral contractorElectrician+2
License activechecked Oct 24, 2026
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19

Jnsd Construction Inc

Ontario, CA · (323) 378-0109

CA-CSLB 1080741 · B C10 +2General contractorElectricianFire sprinkler contractor+1
License activechecked Oct 24, 2026
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