How to Check a Contractor's License in Wisconsin

Wisconsin requires contractors who build or remodel one- and two-family homes to hold state-issued credentials through the Department of Safety and Professional Services (DSPS). Unlike states that issue a single general contractor license, Wisconsin uses a two-part system: a Dwelling Contractor certification for the business and a Dwelling Contractor Qualifier certification for the individual who oversees the work.

That system can be confusing if you have never dealt with it before. This guide walks through exactly how to look up a contractor's credentials in Wisconsin, what the different credential types mean, and what else you should verify before signing a contract.

Does Wisconsin require a contractor license?

Yes, for residential construction. Wisconsin requires contractors who build or remodel one- and two-family dwellings to hold a Dwelling Contractor certification (business level) and employ at least one person with a Dwelling Contractor Qualifier certification (individual level), both issued by the Department of Safety and Professional Services (DSPS). Commercial general contractors do not need a state license, though specialty trades like plumbing, electrical, and HVAC require their own DSPS credentials regardless of project type.

Wisconsin does not issue a single "general contractor license." Instead, the DSPS manages a credential system that applies specifically to residential construction. Here is how it breaks down:

• Dwelling Contractor certification - this is the business-level credential. Any company that wants to pull building permits for one- and two-family dwelling construction or remodeling must hold this certification. It requires proof of at least $250,000 in general liability insurance.
• Dwelling Contractor Qualifier certification - this is the individual-level credential. The company must employ at least one person who holds a Qualifier certification. This person has completed a 12-hour approved course covering Wisconsin building codes, construction practices, and business regulations.
• Restricted Dwelling Contractor certification - a limited version for contractors whose scope of work is narrower than full residential construction. The same Qualifier requirement applies.

The important distinction is that you need to verify both the business and the individual. A contractor might have a valid Qualifier certification personally but work for a company whose Dwelling Contractor certification has lapsed. Both need to be current.

Commercial construction is handled differently. Wisconsin does not require a state license for commercial general contractors, though specific trades still need credentials regardless of the project type.

What is Wisconsin's contractor licensing database?

Wisconsin's official credential lookup is run by the Department of Safety and Professional Services (DSPS). You can search at the DSPS Public License Lookup or the newer LicensE portal. Search by the contractor's personal name (for Qualifier credentials), business name (for the Dwelling Contractor company certification), or credential number. The lookup is free and publicly accessible. Both the business and individual credentials must show as active.

DSPS offers a free, public credential search tool. You can access it through two paths depending on what type of credential you are looking up.

For dwelling contractor and qualifier certifications, go to the DSPS Public License Lookup page. This tool covers health, business, and trades credentials. You can also use the newer LicensE portal which serves as an updated interface for credential searches.

To search, you can use:

• Personal name- enter the contractor's first and last name to find individual credentials like the Dwelling Contractor Qualifier
• Business name - search the company name to find the Dwelling Contractor certification tied to the business entity
• Credential number - the fastest method if the contractor has given you their number directly

When results come back, pay attention to the credential status. You want to see an active or current status. If it shows expired, inactive, or surrendered, that contractor cannot legally pull permits for dwelling construction in Wisconsin.

Also check the expiration date. Dwelling Contractor Qualifier certifications must be renewed every two years, which requires 12 hours of continuing education and a $30 renewal fee. A credential that is technically active but expires next week could become a problem mid-project.

What do Wisconsin's contractor credential types mean?

The DSPS lookup returns several credential types. The two that matter most for residential work are the Dwelling Contractor (company credential) and the Dwelling Contractor Qualifier (individual credential). You need both to be active. A Restricted Dwelling Contractor credential covers a narrower scope of work — if your project is a major addition or new build, confirm the contractor holds the full, non-restricted certification. Specialty credentials like plumber and electrician are also searchable through the same DSPS tool.

The DSPS lookup may return several different credential types. Here is what each one means for you as a homeowner:

• Dwelling Contractor - the company is authorized to perform construction, remodeling, or improvement work on one- and two-family dwellings. This is the main credential you want to see for any residential project.
• Dwelling Contractor Qualifier - an individual who has passed the required education and is certified to oversee dwelling construction work. The company must have at least one active Qualifier on staff.
• Restricted Dwelling Contractor - a business credential with a narrower scope. These contractors are limited to specific types of dwelling work rather than full-scope construction. If your project is a major addition or new build, make sure the contractor holds the full (non-restricted) certification.
• UDC Construction Site Erosion Control - a separate credential for contractors involved in erosion control on construction sites under the Uniform Dwelling Code. This is relevant for new construction but not typical remodeling work.

If you are hiring for a full home build or significant renovation, look for both a Dwelling Contractor certification on the business and a Dwelling Contractor Qualifier certification on the individual running the job. Those two together confirm that the company meets Wisconsin's requirements.

How are specialty trades licensed in Wisconsin?

Wisconsin plumbers, electricians, and HVAC contractors each require their own DSPS credentials. Wisconsin issues nine plumbing license types, with plumbers required to complete 24 hours of continuing education every four years. Electricians hold master or journeyman licenses (including residential-specific designations) with 18 hours of continuing education required every four years. HVAC contractors register with DSPS rather than holding a full license. All can be verified through the same DSPS lookup tool.

Beyond dwelling contractors, DSPS also licenses several specialty trades. If your project involves any of these, the subcontractors handling that work need their own credentials:

• Plumbers - Wisconsin issues apprentice, journeyman, and master plumber licenses. There are nine plumbing license types in total, including restricted appliance and restricted service classifications. Plumbers must complete 24 hours of continuing education every four years to maintain their license.
• Electricians - the state issues master electrician and journeyman electrician licenses, each with specialty classifications. Residential master and residential journeyman designations exist for those working specifically on family dwellings. Master electricians must complete 18 hours of continuing education every four years.
• HVAC contractors - heating, ventilation, and air conditioning contractors must register with DSPS, though the requirement is a registration rather than a full license. Still verify that the registration is active before work begins.
• Soil testers and private onsite wastewater treatment system (POWTS) professionals - if your property uses a septic system, any work on it requires licensed POWTS professionals.

All of these can be verified through the same DSPS license lookup tool. Search by the individual's name or license number and confirm the credential type matches the trade they are performing.

Are there local contractor licensing requirements in Wisconsin cities?

Yes. Milwaukee requires a separate City Home Improvement Contractor License on top of the state DSPS credential, including a certificate of insurance, performance bond, and police department fingerprinting. Madison does not require a separate local license but does require a $5,000 license and permit bond through the Department of Engineering. Many mid-size cities — Green Bay, Kenosha, Racine — have their own registration or licensing requirements. Always check with your local building department before work begins.

Wisconsin's state credentials cover the baseline, but many cities and counties add their own licensing requirements. This is one of the trickier parts of verifying a contractor in Wisconsin because local rules vary significantly.

• Milwaukee - requires a separate City Home Improvement Contractor License on top of the state dwelling contractor certification. The city application requires a certificate of insurance, a performance bond, and fingerprinting through the Milwaukee Police Department. Home improvement, electrical, plumbing, and concrete contractors must all be licensed by the city.
• Madison - does not require a separate local contractor license beyond the state credential. However, the city does require contractors to post a $5,000 license and permit bond through the Department of Engineering.
• Green Bay, Kenosha, Racine, and other municipalities - many mid-size Wisconsin cities have their own registration or licensing requirements. The specifics vary from one municipality to the next.

Before hiring, contact your local building department or city clerk's office to ask whether contractors working in your jurisdiction need any additional local permits or registrations. Even if a contractor holds valid DSPS credentials, they may not be authorized to work in your specific municipality without a local license.

What should I check beyond a Wisconsin contractor's DSPS credential?

Confirm the contractor carries at least $250,000 in general liability insurance (required for Dwelling Contractor certification) by requesting a current certificate and verifying with the insurer directly. If the contractor has employees, verify workers' compensation coverage. Check the Wisconsin Circuit Court Access (WCCA) system for civil judgments. Look for any disciplinary actions noted in the DSPS lookup results. For all projects, get a written contract covering scope, timeline, payment schedule, and warranty terms before work begins.

A valid DSPS credential confirms that the contractor meets Wisconsin's minimum requirements, but it does not tell you everything you need to know. Here are the other things worth verifying:

• Insurance- Wisconsin requires dwelling contractors to carry at least $250,000 in general liability insurance. Ask for a current certificate of insurance and confirm it has not expired. If the contractor will have employees on your property, verify they also carry workers' compensation coverage.
• Better Business Bureau - check the BBB website for complaint history. A contractor with valid credentials but a pattern of unresolved complaints is still a risk.
• Wisconsin court records - search the Wisconsin Circuit Court Access (WCCA) system for any civil lawsuits or judgments against the contractor. This is free and public.
• DSPS disciplinary actions - the DSPS lookup results may show whether any disciplinary actions have been taken against the credential. Look for notes about suspensions, revocations, or conditions placed on the license.
• Written contract - Wisconsin law has specific requirements for home improvement contracts. Get everything in writing, including the scope of work, timeline, payment schedule, and warranty terms. A licensed contractor who refuses to put the agreement in writing is a warning sign.
• References and past work - ask for references from recent projects similar in scope to yours. Credentials tell you the contractor met minimum requirements, not that they do quality work.

The bottom line

Checking a contractor's license in Wisconsin means verifying two things through DSPS: the business holds a Dwelling Contractor certification, and at least one person on their team holds a Dwelling Contractor Qualifier certification. Both need to be active and current. For specialty trades like plumbing, electrical, and HVAC, verify the individual tradesperson's license separately through the same DSPS lookup tool.

Do not stop at the state level. Check whether your city or county requires additional local licensing, especially if you are in Milwaukee or another municipality with its own contractor regulations. And always verify insurance, check for complaints, and get a written contract before any work begins. The license search takes five minutes. Skipping it can cost you thousands.