Quick answer: If you hold C-39 Roofing, C-8 Concrete, C-20 HVAC, C-22 Asbestos Abatement, or D-49 Tree Service, California requires workers’ compensation today even with zero employees under SB 216. All other CSLB classifications must comply by January 1, 2028 under SB 1455. Reviewed by Pascal Burke, Licensed CA Insurance