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

American Infastructure

Covina, CA · (323) 271-4602

CA-CSLB 1030873 · A B +2General engineering contractorGeneral contractorElectrician+1
License activechecked Oct 24, 2026
CallDetails
08

Aqua-Q Inc

Chino Hills, CA · (909) 591-0802

CA-CSLB 923071 · C55Plumber
License activechecked Oct 24, 2026
CallDetails
09

Aquacubed LLC

San Dimas, CA · (626) 627-4160

CA-CSLB 1142288 · C55Plumber
License activechecked Oct 24, 2026
CallDetails
14

B B S Construction Inc

West Covina, CA · (951) 505-3143

CA-CSLB 839266 · A B +3General engineering contractorGeneral contractorFlooring contractor+2
License activechecked Oct 24, 2026
CallDetails
18

Baccaro Peter Thomas

Fullerton, CA · (714) 870-8051

CA-CSLB 404740 · B C6 +3General contractorCarpenterElectrician+2
License activechecked Oct 24, 2026
CallDetails
19

Baldwin Builders

Covina, CA · (909) 599-0033

CA-CSLB 992380 · ASB B +5Asbestos and hazardous materials abatementGeneral contractorPlumber+2
License activechecked Oct 24, 2026
CallDetails
20

Baolo P & C Inc

LA Habra, CA · (714) 371-5080

CA-CSLB 954610 · B C36General contractorPlumber
License activechecked Oct 24, 2026
CallDetails