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C2 Insulation and Acoustical License (California)
California has 1,169 active C2 Insulation and Acoustical holders in the state file as of 2026-10-261, the 35th-largest of 64 classes with at least 200 holders. 38 of them expire by 2026-12-26.
- Active holders
- 1,169
- 0.5% of active California licenses
- Expiring by 2026-12-26
- 38
- 3.3% of holders
- Median bond on file
- $25,000
- 1,169 bonds
- Workers' comp exempt
- 20.6%
- of 1,169 with WC status
How many C2 contractors are exempt from workers' comp?
241 of 1,169 active C2 holders with a recorded status (20.6%) filed an exemption1, against 48.7% across all California classes.
How do you check a C2 license?
Search by license number or business name on the California license lookup, which reads the same state file.
Sources
- CA CSLB License Master (cslb.ca.gov data portal) (cslb.ca.gov, 2026-10-26)