Most residential builders must have a state credential. Electricians, plumbers and some specialty trades must have a state credential. For a complete list of credential categories in Wisconsin, go here.
To verify that a contractor has their credentials, click on here.
Contractor forms are available online at here.
To find out who has a Wisconsin credential, call the Credentialing Unit at (608) 261-8500.
Or, more detailed information on Wisconsin’s contractor licensing policy