Licensed Insulation & Acoustical (C-2) contractors in California

The California Contractors State License Board (CSLB) lists 696 California contractors classified C-2 (Insulation & Acoustical (C-2)). Each entry below links to a full dossier with license status, insurance, bond, and enforcement — as of October 6, 2026.

Showing 1–60 of 696 contractors

1. D & N Acoustics INC

   Anaheim, CA · CSLB #1005969 · as of October 6, 2026
   Suspended · bond payout
2. #1 Acoustics

   Hayward, CA · CSLB #749358 · as of October 6, 2026
   Active · clear
3. 805 Contracting INC

   Santa Barbara, CA · CSLB #1058974 · as of October 6, 2026
   Active · clear
4. 8 A Insulation CO

   Ceres, CA · CSLB #911632 · as of October 6, 2026
   Active · clear
5. A&a Insulation General Partnership

   Victorville, CA · CSLB #1130927 · as of October 6, 2026
   Active · clear
6. Larry O Crother INC DBA Abc Insulation & Supply CO

   Rancho Cordova, CA · CSLB #369263 · as of October 6, 2026
   Active · clear
7. Above And Beyond Insulation

   Anaheim, CA · CSLB #1155454 · as of October 6, 2026
   Active · clear
8. Abs Acoustics

   San Diego, CA · CSLB #931587 · as of October 6, 2026
   Active · clear
9. Accurate Acoustics INC

   Riverside, CA · CSLB #756641 · as of October 6, 2026
   Active · clear
10. Accurate Firestop & Insulation

    Pleasanton, CA · CSLB #710044 · as of October 6, 2026
    Active · clear
11. Ace Insulation Incorporation

    Petaluma, CA · CSLB #962891 · as of October 6, 2026
    Active · clear
12. Ach Insulation LLC

    Moreno Valley, CA · CSLB #624628 · as of October 6, 2026
    Active · clear
13. Ac Masters INC

    Los Angeles, CA · CSLB #1051755 · as of October 6, 2026
    Active · clear
14. Acme Acoustic

    Concord, CA · CSLB #1151512 · as of October 6, 2026
    Active · clear
15. Acoustical Connection

    Oceano, CA · CSLB #998043 · as of October 6, 2026
    Active · clear
16. Acoustical Designs

    Occidental, CA · CSLB #969869 · as of October 6, 2026
    Active · clear
17. Acoustical Engineers Of California

    Rancho Cordova, CA · CSLB #443001 · as of October 6, 2026
    Active · clear
18. Acoustics & Building Interiors INC

    Poway, CA · CSLB #561663 · as of October 6, 2026
    Active · clear
19. Acoustic Solutions

    Fresno, CA · CSLB #920917 · as of October 6, 2026
    Active · clear
20. Ad-in Incorporated

    Fremont, CA · CSLB #655165 · as of October 6, 2026
    Active · clear
21. Ad Insulation

    Tracy, CA · CSLB #1122512 · as of October 6, 2026
    Active · clear
22. A D L Professional Insulation

    Antioch, CA · CSLB #1064718 · as of October 6, 2026
    Active · clear
23. Advanced Drywall Construction INC

    Fresno, CA · CSLB #1040914 · as of October 6, 2026
    Active · clear
24. Advanced Installations INC

    Palm Desert, CA · CSLB #520860 · as of October 6, 2026
    Active · clear
25. Advantage Plus Energy Insulation

    San Clemente, CA · CSLB #942625 · as of October 6, 2026
    Active · clear
26. Alfredo Esparza DBA A E Acoustics

    Walnut, CA · CSLB #460512 · as of October 6, 2026
    Active · clear
27. Christian Fernando Aguilar

    Pomona, CA · CSLB #1055906 · as of October 6, 2026
    Active · clear
28. Harvey Aingworth Acoustic Ceilings

    Thousand Oaks, CA · CSLB #715743 · as of October 6, 2026
    Active · clear
29. Air Control Systems INC

    Ontario, CA · CSLB #639003 · as of October 6, 2026
    Active · clear
30. Air King

    Scottsdale, CA · CSLB #1011322 · as of October 6, 2026
    Active · clear
31. Airpro Master INC

    Las Vegas, CA · CSLB #1012763 · as of October 6, 2026
    Active · clear
32. Air Seal Insulation INC

    Oxnard, CA · CSLB #1102423 · as of October 6, 2026
    Active · clear
33. California Energy Consortium INC DBA Airsmiths Home Performance

    Sacramento, CA · CSLB #950795 · as of October 6, 2026
    Active · clear
34. A J Heating & Cooling INC

    Union City, CA · CSLB #921382 · as of October 6, 2026
    Active · clear
35. A M Wighton And Sons DBA A & J Refrigeration

    San Luis Obispo, CA · CSLB #488379 · as of October 6, 2026
    Active · clear
36. Alert Insulation Of California LLC

    La Puente, CA · CSLB #1077712 · as of October 6, 2026
    Active · clear
37. Alexander Acoustics

    San Diego, CA · CSLB #883917 · as of October 6, 2026
    Active · clear
38. All About Insulation INC

    Hollister, CA · CSLB #1117122 · as of October 6, 2026
    Active · clear
39. All About T-bar

    Diamond Bar, CA · CSLB #570421 · as of October 6, 2026
    Active · clear
40. All Climate Air INC

    Bakersfield, CA · CSLB #870111 · as of October 6, 2026
    Active · clear
41. Alley Cat Creations

    San Leandro, CA · CSLB #1018396 · as of October 6, 2026
    Active · clear
42. Allied Insulation INC

    Redondo Beach, CA · CSLB #496841 · as of October 6, 2026
    Active · clear
43. All Season's Insulation

    Pleasant Hill, CA · CSLB #807832 · as of October 6, 2026
    Active · clear
44. All - Star Insulation CO

    Claremont, CA · CSLB #784825 · as of October 6, 2026
    Active · clear
45. All State Insulation INC

    Fremont, CA · CSLB #1148090 · as of October 6, 2026
    Active · clear
46. Allstate Spray Foam Insulation

    Visalia, CA · CSLB #1052735 · as of October 6, 2026
    Active · clear
47. All Valley Acoustics

    Fresno, CA · CSLB #998918 · as of October 6, 2026
    Active · clear
48. Alpha HVAC & Electrical

    San Jose, CA · CSLB #1060833 · as of October 6, 2026
    Active · clear
49. Alpha Insulation

    Bakersfield, CA · CSLB #1150165 · as of October 6, 2026
    Active · clear
50. Alpha Insulation

    Victorville, CA · CSLB #1071845 · as of October 6, 2026
    Active · clear
51. Am Acoustics

    Brentwood, CA · CSLB #1147072 · as of October 6, 2026
    Active · clear
52. America Insulation

    Sacramento, CA · CSLB #1152946 · as of October 6, 2026
    Active · clear
53. American Acoustics

    San Diego, CA · CSLB #974392 · as of October 6, 2026
    Active · clear
54. American Attic

    Oakland, CA · CSLB #1059651 · as of October 6, 2026
    Active · clear
55. American Attics

    Tracy, CA · CSLB #1117229 · as of October 6, 2026
    Active · clear
56. American Hmi Insulation

    Dos Palos, CA · CSLB #1133527 · as of October 6, 2026
    Active · clear
57. American Industrial Scaffolding INC

    Concord, CA · CSLB #1008202 · as of October 6, 2026
    Active · clear
58. Bradley Jay Amidan

    Azusa, CA · CSLB #1080460 · as of October 6, 2026
    Active · clear
59. Anderson Rowe & Buckley INC

    San Francisco, CA · CSLB #91594 · as of October 6, 2026
    Active · clear
60. Anthon Incorporated

    Livermore, CA · CSLB #952663 · as of October 6, 2026
    Active · clear

Data sourced from the California Contractors State License Board (CSLB), current as of October 6, 2026. IsItLicensed is not affiliated with or endorsed by the CSLB or the State of California. Always verify against the official record.