The short version: Wisconsin licenses contractors through the Department of Safety and Professional Services (DSPS). For general work on a one- or two-family home, the contractor who pulls the permit needs a Dwelling Contractor credential, and the company needs a Dwelling Contractor Qualifier on record. Verify both at dsps.wi.gov/Credentialing/Lookup. Your consumer protection comes from ATCP 110, Wisconsin’s home improvement rule, which sets contract requirements and a three-business-day right to cancel.

Wisconsin’s two-credential system

Wisconsin does something most states do not: it splits residential contractor licensing into two credentials, and a legitimate contractor needs both.1 For general construction on a one- or two-family home where the contractor pulls the building permit, the law requires a Dwelling Contractor credential for the business and a Dwelling Contractor Qualifier for an individual at that business.

CredentialWho holds itWhat it means
Dwelling Contractor (DC)the businessthe company is certified to pull permits and build
Dwelling Contractor Qualifier (DCQ)a person at the companythat person passed the required training

The Qualifier completes a 12-hour DSPS-approved course covering the Uniform Dwelling Code, contract law, and Wisconsin home improvement trade practices. Each Dwelling Contractor firm must keep at least one Qualifier on record. When you check a contractor, confirm both.

This is the Wisconsin-specific companion to our national state contractor license lookup guide. For the full pre-hire workflow, see How to Find a Senior-Friendly Contractor.

How to verify: dsps.wi.gov/Credentialing/Lookup

To verify: open the DSPS credential lookup at dsps.wi.gov/Credentialing/Lookup.1 Search by business name, individual name, or credential number.

Check:

  1. Status active (not expired, suspended, revoked)
  2. Dwelling Contractor the business holds an active DC credential
  3. Qualifier the company has a DCQ on record
  4. Name matches the business and person on your quote
  5. Discipline any recent DSPS action

A contractor who cannot produce an active DC credential for permit-pulled residential work is not properly certified in Wisconsin. That is reason enough to stop.

DSPS also licenses the trades

Electrical, plumbing, and HVAC work in Wisconsin is licensed by DSPS as well.1 These are separate credentials from the Dwelling Contractor certification.

If your senior project includes new wiring for a stair lift circuit, plumbing for a curbless shower, or HVAC changes, verify each tradesperson’s own DSPS license at the same lookup. The general contractor’s Dwelling Contractor credential does not stand in for an electrician’s or plumber’s license.

ATCP 110: Wisconsin’s home improvement rule

Wisconsin’s consumer protection for home improvement lives in a rule called ATCP 110, administered by the Department of Agriculture, Trade and Consumer Protection (DATCP).2 It sets the rules every contractor must follow: when a written contract is required, what it must contain, deposit and completion rules, warranties, and lien waivers.

Under ATCP 110, a written contract is required when the contractor asks for payment before the work is finished, when the deal is made face-to-face away from the contractor’s office, or when it starts by phone, mail, or a flyer.3 Most senior home improvement jobs fit at least one of those.

Your cancellation right: ATCP 110 gives you a three-business-day right to cancel certain home improvement contracts. Sign and date a notice of cancellation and mail it to the contractor before midnight of the third business day.3 This is your escape hatch from a high-pressure kitchen-table sale.

For your own protection, get scope, materials, total price, and dates in writing before any deposit, even when ATCP 110 would not strictly require it. Pay by check or card, never cash.

Wisconsin senior scam patterns

  • Winter ice dam crews After heavy snow, crews knock door to door offering ice dam removal. Careless chipping with hammers and chisels can crack shingles and gutters, turning a small problem into a roof repair.
  • Post-storm and hail roofers Spring and summer storms draw out-of-state roofing crews and “free inspection” pitches that turn into pressure to sign.
  • Driveway sealcoating crews A Midwest regular: leftover material offered at a discount, thin work, and a crew gone by morning.
  • Your defenses the ATCP 110 three-day cancellation right and the DATCP complaint process.3

If something goes wrong

  • Home improvement practice violations: file with DATCP at datcp.wi.gov, which enforces ATCP 110.
  • Credential problems: file with DSPS at dsps.wi.gov, which can discipline the Dwelling Contractor or trade license.
  • Broader fraud: contact the Wisconsin Department of Justice.
  • Elder financial abuse: contact your county adult protective services.
Wisconsin verification in 30 seconds:
  • Verify at dsps.wi.gov/Credentialing/Lookup
  • Confirm the business holds an active Dwelling Contractor credential
  • Confirm a Dwelling Contractor Qualifier is on record for the company
  • Verify electrical, plumbing, and HVAC trade licenses separately
  • Get an ATCP 110 written contract before any deposit; you have 3 days to cancel
  • Verify insurance with the carrier directly ($1M general liability for $10K+ jobs)
  • Winter ice dam and post-storm roofers active; never door-to-door

Citations

  1. Credential Search (License Lookup). Wisconsin Department of Safety and Professional Services (DSPS), retrieved June 13, 2026. .
  1. Chapter ATCP 110: Home Improvement Practices. Wisconsin Legislature (Administrative Code), retrieved June 13, 2026. .
  1. Home Improvement Consumer Tips. Wisconsin Department of Agriculture, Trade and Consumer Protection (DATCP), retrieved June 13, 2026. .
  1. Home Improvement Scams Targeting Older Adults. AARP Fraud Watch Network, June 2024. .