Minnesota licenses trade contractors through the Department of Labor and Industry (DLI), which regulates plumbing, electrical, and residential building/roofing contractors, along with mechanical (HVAC) contractors. Unlike some states where only individual tradespeople are licensed, Minnesota licenses at the business level for these trades — meaning the license is tied to the company you hire, not just whichever technician shows up.
All four of these — plumbing, electrical, residential/roofing, and mechanical — are real, exam-backed business licenses in Minnesota, not general registrations. That's a meaningfully stronger credential than what some states offer: the business had to demonstrate qualifying experience and pass a licensing exam specific to that trade, not just file paperwork and pay a fee.
DLI publishes license data as a nightly export, which is exactly what TrustedTradesFinder pulls from directly — every Minnesota listing on this site reflects DLI's own records, refreshed on a recurring schedule, not a scrape of a search results page or a static snapshot from months ago.
License status in Minnesota follows the same categories you'll see across this site: active, expired, revoked, or pending. An active license means the contractor is currently in good standing with DLI as of the last data refresh. Minnesota licenses typically renew on a set cycle, and a lapsed renewal shows up as expired rather than active — worth checking directly if you're relying on a listing that hasn't been recently updated.
To verify a Minnesota contractor's license yourself, DLI runs its own public license lookup tool, searchable by business name or license number. It's worth doing this final check yourself before a large job, especially if time has passed since you first found a contractor — license status can change, and DLI's own tool is always the most current source.
One thing worth knowing if you're comparing Minnesota to other states: not every state licenses all four of these trades at the business level, and some don't license certain trades statewide at all (leaving it to cities and counties instead). Minnesota's approach — real, tested, business-level licenses across plumbing, electrical, HVAC, and residential building — is on the stronger end of what states actually require, which is part of why Minnesota was the first state built into this directory.