Official-source contractor reference
Contractor licensing, state by state.
There is no national contractor license. These 300 guides explain what each state requires for electrical, HVAC, and plumbing work: who issues the credential, what the exam and experience rules are, what it costs, and which local rules still matter. Every guide links back to its issuing agency and shows when it was checked.
Electrical
50 state guides. 45 states license the trade at state level; the others are clear about the city, county, or limited-scope rule instead.
Browse all states →HVAC
50 state guides. 37 states license the trade at state level; the others are clear about the city, county, or limited-scope rule instead.
Browse all states →Landscaping
50 state guides. 23 states license the trade at state level; the others are clear about the city, county, or limited-scope rule instead.
Browse all states →Plumbing
50 state guides. 44 states license the trade at state level; the others are clear about the city, county, or limited-scope rule instead.
Browse all states →Remodeling
50 state guides. 31 states license the trade at state level; the others are clear about the city, county, or limited-scope rule instead.
Browse all states →Roofing
50 state guides. 32 states license the trade at state level; the others are clear about the city, county, or limited-scope rule instead.
Browse all states →Rules and fees change. Each guide is a factual starting point, not legal advice; confirm the current requirement with the named agency before you bid, advertise, or begin work.
Licensed and still hard to find on Google?
The licensing work is one part of running a local service business. We can review the local market, current search visibility, and paid-search fit before recommending anything.