Two things every California contractor needs
Know exactly who you’re working with, and protect your right to get paid for the work you do. Both built on California’s CSLB record of every licensed contractor.
- 225K+
- Active licenses
- 58
- CA counties
- 74
- Trade classes
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Every record on Prelien is sourced directly from the California Contractors State License Board.
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Featured trades
The CSLB classifications most often pulled by subs and material suppliers. Pick a trade to filter the directory.
- General Building
From foundation to finish — full-service builders.
99,642 licensees - Electrical
Wiring, panels, and anything that conducts.
26,905 licensees - Plumbing
Pipes, fixtures, water in and water out.
17,034 licensees - HVAC
Heating, cooling, and clean indoor air.
11,816 licensees - Painting
Interior, exterior, and everything in between.
15,405 licensees - Landscaping
Lawns, hardscapes, and what grows around them.
12,364 licensees - Roofing
Shingles, flat roofs, and everything overhead.
5,578 licensees - Engineering
Civil works, grading, and large-scale infrastructure.
14,173 licensees
Top counties
Where California's licensed contractors concentrate. Pick a county to see every active CSLB record in the region.
Verify a contractor in three steps
Find any of 225,000+ CSLB licensees by name, license number, county, or trade.
License status, bond on file, workers' comp, and lien activity at a glance.
Public records sourced directly from CSLB, so you can transact informed.