The Minnesota Department of Labor & Industry establishes the rules for licensing of contractors. Most contractors are required to be licensed, however, there are some exceptions. You should ask your contractor if they are licensed. If a contractor asks you to apply for the building permit, chances are they are not licensed because we verify contractor licensing for all building permit applications. Resident homeowners do not have to be licensed to perform work on their own home. If you have questions about contractor licensing, contact the Department of Commerce at 651-539-1500.