Basic eligibility includes being at least 21 years old, documenting experience in the trade, passing the applicable business-and-law and trade examinations, and maintaining proof of general liability insurance. Many categories also require a surety bond, and employers with three or more workers must carry workers' compensation coverage.
Requirements, fees, and inspection processes vary by trade and jurisdiction. The state license sets the floor; the county sets your work plan. Pick a county below to find licensing requirements for your specific trade.
What the state covers
The state issues residential and general contractor licenses with project-value caps, plus separate trade-specific licenses for electrical, plumbing, HVAC, and low-voltage work. Roofing, painting, framing, and most other specialty trades operate under a single residential or general license, but may be subject to county registration.