Licensed Heating & Air Conditioning (C-20) contractors in California

The California Contractors State License Board (CSLB) lists 8,995 California contractors classified C-20 (Heating & Air Conditioning (C-20)). Each entry below links to a full dossier with license status, insurance, bond, and enforcement — as of July 2, 2026.

Showing 6,061–6,120 of 8,995 contractors

1. One Stop Heating And Air Conditioning

   Cathedral City, CA · CSLB #1124292 · as of July 2, 2026
   Active · clear
2. One Stop Heating And Cooling INC

   Cerritos, CA · CSLB #1099916 · as of July 2, 2026
   Active · clear
3. One Stop H V A C

   Simi Valley, CA · CSLB #980203 · as of July 2, 2026
   Active · clear
4. One Way Heating & Air Conditioning

   Torrance, CA · CSLB #517230 · as of July 2, 2026
   Active · clear
5. On Line Heating & Air Conditioning

   Citrus Heights, CA · CSLB #690591 · as of July 2, 2026
   Active · clear
6. Only The Best Heating And Air Conditioning

   Arcadia, CA · CSLB #875777 · as of July 2, 2026
   Active · clear
7. On Point Heating And Air Conditioning

   El Cajon, CA · CSLB #1061789 · as of July 2, 2026
   Active · clear
8. On Target Heating & Cooling INC

   National City, CA · CSLB #1020436 · as of July 2, 2026
   Active · clear
9. Ontario Refrigeration Commercial Air Conditioning Heating & Contr

   Ontario, CA · CSLB #315638 · as of July 2, 2026
   Active · clear
10. Onyx Heating And Air

    Victorville, CA · CSLB #1014949 · as of July 2, 2026
    Active · clear
11. Onzone Heating & Cooling INC

    Pleasanton, CA · CSLB #1154419 · as of July 2, 2026
    Active · clear
12. Opposite Weather Heating & Air Conditioing

    Norwalk, CA · CSLB #840683 · as of July 2, 2026
    Active · clear
13. Optimal Air Heating & Air Conditioning

    Murrieta, CA · CSLB #994861 · as of July 2, 2026
    Active · clear
14. Optimal Heating & Air INC

    Bakersfield, CA · CSLB #1063164 · as of July 2, 2026
    Active · clear
15. Optimal Heating And Cooling

    Bakersfield, CA · CSLB #1094205 · as of July 2, 2026
    Active · clear
16. Optimum Aire

    San Diego, CA · CSLB #936940 · as of July 2, 2026
    Active · clear
17. Optimum Heating And Air Conditioning

    Glendora, CA · CSLB #856737 · as of July 2, 2026
    Active · clear
18. Optimum HVAC

    Tustin, CA · CSLB #1074548 · as of July 2, 2026
    Active · clear
19. Optimus HVAC & Plumbing INC

    Castaic, CA · CSLB #1055837 · as of July 2, 2026
    Active · clear
20. Orange County Air Services

    Rancho Cucamonga, CA · CSLB #929240 · as of July 2, 2026
    Active · clear
21. Orange County Cooling Systems

    La Habra, CA · CSLB #1155328 · as of July 2, 2026
    Active · clear
22. Orange County Plumbing Heating Air Conditioning CO INC

    Tustin, CA · CSLB #993990 · as of July 2, 2026
    Active · clear
23. Bam Mechanical INC DBA Orange Heating Air Conditioning And Refrig

    Orange, CA · CSLB #899409 · as of July 2, 2026
    Active · clear
24. Orbit Air Conditioning

    Winnetka, CA · CSLB #1150689 · as of July 2, 2026
    Active · clear
25. Orco Mechanical

    Redwood City, CA · CSLB #822494 · as of July 2, 2026
    Active · clear
26. O R Cooling

    El Centro, CA · CSLB #1135648 · as of July 2, 2026
    Active · clear
27. Oregon S & S Sheetmetal INC

    White City, CA · CSLB #682160 · as of July 2, 2026
    Active · clear
28. Organik Air

    Temecula, CA · CSLB #1071359 · as of July 2, 2026
    Active · clear
29. Orgio Air Services

    Fullerton, CA · CSLB #1153303 · as of July 2, 2026
    Active · clear
30. O R HVAC

    San Jose, CA · CSLB #1038149 · as of July 2, 2026
    Active · clear
31. Origin Heating & Air INC

    Tehachapi, CA · CSLB #1136867 · as of July 2, 2026
    Active · clear
32. Origin Mechanical & HVAC INC

    Pleasant Hill, CA · CSLB #1118842 · as of July 2, 2026
    Active · clear
33. Ornelas Heating & Air Conditioning

    San Jose, CA · CSLB #808460 · as of July 2, 2026
    Active · clear
34. Orosco Heating & Air Conditioning LLC

    Citrus Heights, CA · CSLB #1023814 · as of July 2, 2026
    Active · clear
35. Orozco's Air Conditioning & Heating INC

    Riverside, CA · CSLB #1146121 · as of July 2, 2026
    Active · clear
36. Orravan Mechanical INC

    Lakewood, CA · CSLB #1025455 · as of July 2, 2026
    Active · clear
37. Ortega Heating & Air

    Fallbrook, CA · CSLB #1134767 · as of July 2, 2026
    Active · clear
38. Ortiz Air INC

    Lancaster, CA · CSLB #904070 · as of July 2, 2026
    Active · clear
39. Ortiz Heating & Air Conditioning INC

    Burlingame, CA · CSLB #803346 · as of July 2, 2026
    Active · clear
40. Osc Air Conditioning & Heating INC

    San Pedro, CA · CSLB #1124752 · as of July 2, 2026
    Active · clear
41. Oscar's Heating And Air Conditioning

    Costa Mesa, CA · CSLB #1155372 · as of July 2, 2026
    Active · clear
42. Osinaga Air Systems INC

    Canoga Park, CA · CSLB #1153758 · as of July 2, 2026
    Active · clear
43. Osipov HVAC Repair LLC

    North Hollywood, CA · CSLB #1143845 · as of July 2, 2026
    Active · clear
44. Osl Heating And Air

    Riverside, CA · CSLB #1131337 · as of July 2, 2026
    Active · clear
45. Oss HVAC INC

    Gilroy, CA · CSLB #1134569 · as of July 2, 2026
    Active · clear
46. Ostrander's Heating And Air Conditioning

    Herald, CA · CSLB #891806 · as of July 2, 2026
    Active · clear
47. Otterly Cool Plumbing Heating And Air

    Citrus Heights, CA · CSLB #1137324 · as of July 2, 2026
    Active · clear
48. Otter Services HVAC LLC

    Pleasant Hill, CA · CSLB #1120686 · as of July 2, 2026
    Active · clear
49. Otto Climate INC

    Sunland, CA · CSLB #799428 · as of July 2, 2026
    Active · clear
50. Overhead Products INC

    Carmichael, CA · CSLB #722313 · as of July 2, 2026
    Active · clear
51. Ov Mechanical Heating And Air

    Eastvale, CA · CSLB #1034624 · as of July 2, 2026
    Active · clear
52. Owen Mechanical Heating And Air Conditioning CO

    Orangevale, CA · CSLB #724145 · as of July 2, 2026
    Active · clear
53. Owen Refrigeration & Air

    Visalia, CA · CSLB #945337 · as of July 2, 2026
    Active · clear
54. Owens Heating & Air Conditioning

    Tujunga, CA · CSLB #434130 · as of July 2, 2026
    Active · clear
55. P1 Construction LLC DBA P1 Mechanical

    Lenexa, CA · CSLB #1095829 · as of July 2, 2026
    Active · clear
56. Paac Heating & Air

    Chula Vista, CA · CSLB #1086761 · as of July 2, 2026
    Active · clear
57. Pab Solar And Air INC

    San Jose, CA · CSLB #853463 · as of July 2, 2026
    Active · clear
58. Pac-air Heating & Air Conditioning INC

    Fresno, CA · CSLB #967189 · as of July 2, 2026
    Active · clear
59. P A C Heating & Air Conditioning

    Lakeside, CA · CSLB #750189 · as of July 2, 2026
    Active · clear
60. Pacific Air

    Fresno, CA · CSLB #847114 · as of July 2, 2026
    Active · clear

Data sourced from the California Contractors State License Board (CSLB), current as of July 2, 2026. IsItLicensed is not affiliated with or endorsed by the CSLB or the State of California. Always verify against the official record.