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

The California Contractors State License Board (CSLB) lists 691 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 August 11, 2026.

Showing 1–60 of 691 contractors

1. #1 Acoustics

   Hayward, CA · CSLB #749358 · as of August 11, 2026
   Active · clear
2. 805 Contracting INC

   Santa Barbara, CA · CSLB #1058974 · as of August 11, 2026
   Active · clear
3. 8 A Insulation CO

   Ceres, CA · CSLB #911632 · as of August 11, 2026
   Active · clear
4. A&a Insulation General Partnership

   Victorville, CA · CSLB #1130927 · as of August 11, 2026
   Active · clear
5. Larry O Crother INC DBA Abc Insulation & Supply CO

   Rancho Cordova, CA · CSLB #369263 · as of August 11, 2026
   Active · clear
6. Above And Beyond Insulation

   Anaheim, CA · CSLB #1155454 · as of August 11, 2026
   Active · clear
7. Abs Acoustics

   San Diego, CA · CSLB #931587 · as of August 11, 2026
   Active · clear
8. Accurate Acoustics INC

   Riverside, CA · CSLB #756641 · as of August 11, 2026
   Active · clear
9. Accurate Firestop & Insulation

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

    Petaluma, CA · CSLB #962891 · as of August 11, 2026
    Active · clear
11. Ach Insulation LLC

    Moreno Valley, CA · CSLB #624628 · as of August 11, 2026
    Active · clear
12. Ac Masters INC

    Los Angeles, CA · CSLB #1051755 · as of August 11, 2026
    Active · clear
13. Acme Acoustic

    Concord, CA · CSLB #1151512 · as of August 11, 2026
    Active · clear
14. Acoustical Connection

    Oceano, CA · CSLB #998043 · as of August 11, 2026
    Active · clear
15. Acoustical Designs

    Occidental, CA · CSLB #969869 · as of August 11, 2026
    Active · clear
16. Acoustical Engineers Of California

    Rancho Cordova, CA · CSLB #443001 · as of August 11, 2026
    Active · clear
17. Acoustic Interior Solutions

    Riverside, CA · CSLB #1129495 · as of August 11, 2026
    Active · clear
18. Acoustics & Building Interiors INC

    Poway, CA · CSLB #561663 · as of August 11, 2026
    Active · clear
19. Acoustic Solutions

    Fresno, CA · CSLB #920917 · as of August 11, 2026
    Active · clear
20. Acousticworks INC

    Escondido, CA · CSLB #775459 · as of August 11, 2026
    Active · clear
21. Ad-in Incorporated

    Fremont, CA · CSLB #655165 · as of August 11, 2026
    Active · clear
22. Ad Insulation

    Tracy, CA · CSLB #1122512 · as of August 11, 2026
    Active · clear
23. A D L Professional Insulation

    Antioch, CA · CSLB #1064718 · as of August 11, 2026
    Active · clear
24. Advanced Drywall Construction INC

    Fresno, CA · CSLB #1040914 · as of August 11, 2026
    Active · clear
25. Advanced Installations INC

    Palm Desert, CA · CSLB #520860 · as of August 11, 2026
    Active · clear
26. Advantage Plus Energy Insulation

    San Clemente, CA · CSLB #942625 · as of August 11, 2026
    Active · clear
27. Alfredo Esparza DBA A E Acoustics

    Walnut, CA · CSLB #460512 · as of August 11, 2026
    Active · clear
28. Christian Fernando Aguilar

    Pomona, CA · CSLB #1055906 · as of August 11, 2026
    Active · clear
29. Harvey Aingworth Acoustic Ceilings

    Thousand Oaks, CA · CSLB #715743 · as of August 11, 2026
    Active · clear
30. Air Control Systems INC

    Ontario, CA · CSLB #639003 · as of August 11, 2026
    Active · clear
31. Air King

    Scottsdale, CA · CSLB #1011322 · as of August 11, 2026
    Active · clear
32. Airpro Master INC

    Las Vegas, CA · CSLB #1012763 · as of August 11, 2026
    Active · clear
33. Air Seal Insulation INC

    Oxnard, CA · CSLB #1102423 · as of August 11, 2026
    Active · clear
34. California Energy Consortium INC DBA Airsmiths Home Performance

    Sacramento, CA · CSLB #950795 · as of August 11, 2026
    Active · clear
35. A J Heating & Cooling INC

    Union City, CA · CSLB #921382 · as of August 11, 2026
    Active · clear
36. A M Wighton And Sons DBA A & J Refrigeration

    San Luis Obispo, CA · CSLB #488379 · as of August 11, 2026
    Active · clear
37. Alert Insulation Of California LLC

    La Puente, CA · CSLB #1077712 · as of August 11, 2026
    Active · clear
38. Alexander Acoustics

    San Diego, CA · CSLB #883917 · as of August 11, 2026
    Active · clear
39. All About Insulation INC

    Hollister, CA · CSLB #1117122 · as of August 11, 2026
    Active · clear
40. All About T-bar

    Diamond Bar, CA · CSLB #570421 · as of August 11, 2026
    Active · clear
41. All Climate Air INC

    Bakersfield, CA · CSLB #870111 · as of August 11, 2026
    Active · clear
42. Alley Cat Creations

    San Leandro, CA · CSLB #1018396 · as of August 11, 2026
    Active · clear
43. Allied Insulation INC

    Redondo Beach, CA · CSLB #496841 · as of August 11, 2026
    Active · clear
44. All Season's Insulation

    Pleasant Hill, CA · CSLB #807832 · as of August 11, 2026
    Active · clear
45. All - Star Insulation CO

    Claremont, CA · CSLB #784825 · as of August 11, 2026
    Active · clear
46. All State Insulation INC

    Fremont, CA · CSLB #1148090 · as of August 11, 2026
    Active · clear
47. Allstate Spray Foam Insulation

    Visalia, CA · CSLB #1052735 · as of August 11, 2026
    Active · clear
48. All Valley Acoustics

    Fresno, CA · CSLB #998918 · as of August 11, 2026
    Active · clear
49. Alpha HVAC & Electrical

    San Jose, CA · CSLB #1060833 · as of August 11, 2026
    Active · clear
50. Alpha Insulation

    Victorville, CA · CSLB #1071845 · as of August 11, 2026
    Active · clear
51. Alpha Insulation

    Bakersfield, CA · CSLB #1150165 · as of August 11, 2026
    Active · clear
52. Am Acoustics

    Brentwood, CA · CSLB #1147072 · as of August 11, 2026
    Active · clear
53. America Insulation

    Sacramento, CA · CSLB #1152946 · as of August 11, 2026
    Active · clear
54. American Acoustics

    San Diego, CA · CSLB #974392 · as of August 11, 2026
    Active · clear
55. American Attic

    Oakland, CA · CSLB #1059651 · as of August 11, 2026
    Active · clear
56. American Attics

    Tracy, CA · CSLB #1117229 · as of August 11, 2026
    Active · clear
57. American Hmi Insulation

    Dos Palos, CA · CSLB #1133527 · as of August 11, 2026
    Active · clear
58. American Industrial Scaffolding INC

    Concord, CA · CSLB #1008202 · as of August 11, 2026
    Active · clear
59. Bradley Jay Amidan

    Azusa, CA · CSLB #1080460 · as of August 11, 2026
    Active · clear
60. Anderson Rowe & Buckley INC

    San Francisco, CA · CSLB #91594 · as of August 11, 2026
    Active · clear

Data sourced from the California Contractors State License Board (CSLB), current as of August 11, 2026. IsItLicensed is not affiliated with or endorsed by the CSLB or the State of California. Always verify against the official record.