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
01

A + Air Corp

Rancho Cucamonga, CA · (909) 821-6359

CA-CSLB 803450 · C20Heating and air conditioning
License activechecked Oct 24, 2026
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04

Afm HVAC

Rancho Cucamonga, CA · (951) 205-5179

CA-CSLB 811183 · C20Heating and air conditioning
License activechecked Oct 24, 2026
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11

Asc Mechanical Inc

Rancho Cucamonga, CA · (909) 313-7771

CA-CSLB 1144103 · C20Heating and air conditioning
License activechecked Oct 24, 2026
CallDetails
12

Atara Mechanical Inc

Rancho Cucamonga, CA · (909) 471-1962

CA-CSLB 1126598 · C20Heating and air conditioning
License activechecked Oct 24, 2026
CallDetails
13

B C M Group Inc

Rancho Cucamonga, CA · (909) 527-3820

CA-CSLB 968356 · A B +5General engineering contractorGeneral contractorConcrete contractor+2
License activechecked Oct 24, 2026
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18

Doair Inc

Rancho Cucamonga, CA · (323) 942-7202

CA-CSLB 1104424 · C20Heating and air conditioning
License activechecked Oct 24, 2026
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19

Hagen Heating & Air

Rancho Cucamonga, CA · (951) 318-1186

CA-CSLB 746913 · C20Heating and air conditioning
License activechecked Oct 24, 2026
CallDetails