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

Heating and air conditioning in Ontario, CA

59 licensed heating and air conditioning · every license checked against the issuer's file

More cities in California

San Jose 296Los Angeles 292Sacramento 265San Diego 256Riverside 225Fresno 181Bakersfield 179Anaheim 158Glendale 128Corona 117El Cajon 117San Francisco 116Escondido 100Modesto 96Stockton 96Santa Rosa 92
Listings 1–20How results are ordered
02

T D I Refrigeration

Rancho Cucamonga, CA · (866) 383-2653

CA-CSLB 764435 · C20 C38Heating and air conditioning
License activechecked Oct 24, 2026
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03

W C C S Inc

Rancho Cucamonga, CA · (909) 982-6979

CA-CSLB 655509 · B C10 +2General contractorElectricianHeating and air conditioning+1
License activechecked Oct 24, 2026
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04

Westland Mechanical LLC

Rancho Cucamonga, CA · (909) 532-2713

CA-CSLB 894940 · B C20General contractorHeating and air conditioning
License activechecked Oct 24, 2026
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05

Williams A/C Service

Rancho Cucamonga, CA · (909) 466-7777

CA-CSLB 1065744 · C20Heating and air conditioning
License activechecked Oct 24, 2026
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06

10 Gauge Sheet Metal Inc

Upland, CA · (909) 560-7055

CA-CSLB 1028768 · B C39 +1General contractorRooferHeating and air conditioning
License activechecked Oct 24, 2026
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10

A C R Technologies

Rancho Cucamonga, CA · (951) 757-5483

CA-CSLB 811487 · C10 C20 +1ElectricianHeating and air conditioningPlumber
License activechecked Oct 24, 2026
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11

A M E Roofing

Upland, CA · (909) 766-3200

CA-CSLB 1057266 · A B +5General engineering contractorGeneral contractorElectrician+2
License activechecked Oct 24, 2026
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12

A R Refrigeration

Rancho Cucamonga, CA · (909) 510-2146

CA-CSLB 985427 · C38Heating and air conditioning
License activechecked Oct 24, 2026
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15

Aandahl Larry M

Jurupa Valley, CA · (909) 973-4076

CA-CSLB 504158 · C20Heating and air conditioning
License activechecked Oct 24, 2026
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20

Acosta AC

Jurupa Valley, CA · (951) 206-5910

CA-CSLB 896856 · C20 D28Heating and air conditioningSpecialty contractor
License activechecked Oct 24, 2026
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