Operating as a contractor in California
California licenses contractors at the state level only — there is no separate city or county contractor-license layer. Residential general contractors typically hold a Class B General Building license, which covers projects involving framing or two or more unrelated trades, or the newer Class B-2 Residential Remodeling classification created in 2021 for remodel-focused firms.
Any job over $500 in combined labor and materials legally requires a CSLB license, and homeowners can look up any license number, bond, and workers’ comp status on the CSLB site — which is exactly why qualified California homeowners expect to hear a license number early in the first call.
CSLB offers no reciprocity or exam waivers with any other state: an out-of-state contractor needs a full California license — Law & Business exam, trade exam, the $25,000 contractor bond, and a registered qualifying individual — or a licensed California partner.
Contractors State License Board (CSLB)What California homeowners are building
The ADU wave here is structural, not a trend. AB 68, AB 881, and SB 13 (all effective January 2020) forced ministerial approval of accessory dwelling units statewide within 60 days, cut minimum setbacks to four feet, and removed owner-occupancy and minimum-lot-size restrictions — overriding local ordinances that used to slow these projects down.
SB 9 pushed further, authorizing urban lot splits and up to two units per split parcel, which extends the small-infill boom beyond backyard units into duplex conversions. For contractors this means ADU and garage-conversion demand is code-mandated and durable across the state.
Alongside the ADU wave, kitchen and bath remodels remain the steadiest volume category, and rebuild work in wildfire-affected parts of Los Angeles County continues to generate substantial demolition and ground-up projects.