Wisconsin Landlord Retaliation Law: But-For Test, Double Damages

Short answer: Wisconsin landlord retaliation law runs on two tracks. Wis. Stat. § 704.45 bars a landlord from raising rent, cutting services, suing for possession, refusing to renew or threatening any of those if a preponderance of the evidence shows it would not happen “but for” retaliation for a code complaint or exercising a tenant right. Separately, Wis. Admin. Code ATCP 134.09(5) bans retaliatory terminations and utility-cutting constructive evictions, and violations can be worth double damages plus attorney fees.

Wisconsin has no presumption window, so timing alone will not win the case. What it offers instead is a consumer-protection rule with real money behind it and a statute that reaches quieter pressure like service cuts and threats.

Wisconsin Landlord Retaliation Rules at a Glance

Protected Activity Under the Statute and the Rule

Section 704.45(1) protects three things: a good-faith complaint about a defect to an elected public official or a local housing code enforcement agency; a complaint to the landlord about a violation of § 704.07 (the landlord’s repair and maintenance duties) or a local housing code; and exercising any legal right relating to residential tenancies.

ATCP 134.09(5) overlaps but adds detail. It protects tenants who reported a violation of ATCP 134 or a building or housing code to any government authority or filed suit over one, joined or tried to organize a tenants’ union or association, or asserted or tried to assert any right specifically given to tenants under state or local law. The tenant-organizing language is explicit in the rule, not the statute.

What Wisconsin Treats as Retaliation

Under § 704.45(1), a landlord may not increase rent, decrease services, bring an action for possession, refuse to renew a lease, or threaten any of these, when the but-for test is met. ATCP 134.09(5) adds three specific forms: terminating a tenancy, giving notice that prevents a lease from renewing automatically, and constructively evicting you “by any means,” expressly including terminating or substantially reducing heat, water or electricity.

The rule also attacks lease fine print. Under ATCP 134.08(1), a rental agreement is void and unenforceable if it lets a landlord raise rent, cut services, sue for possession, refuse renewal or threaten those actions because you contacted law enforcement, health or safety services.

The But-For Test and Its Limits

Wisconsin puts the burden on you to show, by a preponderance of the evidence, that the landlord’s action “would not occur but for” retaliation. That is a causation test: you need evidence connecting your complaint to the landlord’s move, not just a coincidence in timing. Helpful facts include the landlord’s own words, a sudden change after years of renewals, or treatment that differs from neighbors’.

Two limits apply. Section 704.45(2) lets a landlord sue for possession if you have not paid rent, other than a rent increase that the statute itself prohibits. And § 704.45(3) says the section does not apply to complaints about defects you caused through negligence or improper use.

Remedies: Defense, Double Damages and Fees

Because § 704.45 says the landlord “may not” bring an action for possession when the retaliation test is met, retaliation is a basis for contesting an eviction case. For violations of ATCP 134, including retaliatory termination, retaliatory utility cuts and self-help eviction, Wis. Stat. § 100.20(5) lets a person who suffers a pecuniary loss sue and recover twice that loss, together with costs and a reasonable attorney fee. ATCP 134’s own note confirms tenants may sue directly under § 100.20(5).

Doubling means documentation pays. Moving costs, a hotel stay during a utility cutoff, spoiled food and higher replacement rent are all losses worth tracking with receipts.

Lockouts and Self-Help Eviction

ATCP 134.09(7) bars a landlord from excluding, forcibly evicting or constructively evicting you other than through the eviction procedure in chapter 799 of the statutes. Under ATCP 134.08(2), a lease clause authorizing eviction or exclusion outside judicial procedures voids the rental agreement. A changed lock or a shutoff after you complain can violate both the self-help ban and the retaliation rule.

Wisconsin does not have a formal rent escrow procedure. Under § 704.07(4), if you stay in a unit that has become untenantable, or that has a substantial violation of the landlord’s duties in § 704.07(2) materially affecting health or safety, rent abates to the extent you are deprived of full normal use. The statute says it does not authorize withholding rent in full, and withholding beyond the abated amount can open you to an unpaid-rent eviction that § 704.45(2) still allows.

A Worked Example

Rosa has rented a Milwaukee flat for four years on one-year leases that renew automatically, at $1,150 a month. In March 2026, she reports a failing porch and exposed wiring to the city’s code enforcement agency. In April, after an inspection, her landlord sends written notice that her lease will not automatically renew.

Giving notice preventing automatic renewal is expressly listed in ATCP 134.09(5). Rosa’s four years of renewals, the timing and any message linking the notice to the inspection are her evidence for the § 704.45 but-for test. If she must move and can prove $2,400 in moving costs and higher rent, § 100.20(5) would double that loss to $4,800, plus her attorney fee.

If Rosa had stopped paying rent in protest, § 704.45(2) would let the landlord bring an eviction for the unpaid rent regardless.

Documenting a Wisconsin Claim

• Keep the complaint and inspection record from the code agency or elected official.
• Collect causation evidence: prior renewals, the landlord’s statements and how other tenants were treated.
• Track every dollar of loss, since § 100.20(5) doubles pecuniary losses.
• Read your lease for clauses ATCP 134.08 makes void.
• Use our tools: a dated request from our repair request letter generator and a timeline check in our landlord retaliation checker.

Discrimination is separately covered by Wisconsin’s open housing law. § 106.50(1) covers sex, race, color, sexual orientation, disability, religion, national origin, marital status, family status, status as a victim of domestic abuse, sexual assault or stalking, lawful source of income, age and ancestry.

Frequently Asked Questions

Is a nonrenewal two weeks after my code complaint automatically retaliation in Wisconsin?

No. Section 704.45 has no presumption period. You must show by a preponderance of the evidence that the action would not have happened but for retaliation, though close timing is part of that evidence.

Can my Wisconsin landlord stop my lease from auto-renewing after I complain?

Not in retaliation. ATCP 134.09(5) specifically bars giving “notice preventing the automatic renewal of a lease” in retaliation for code reports, organizing or asserting tenant rights, and § 704.45(1) bars refusing to renew.

What if my landlord cuts the heat after I call the inspector?

ATCP 134.09(5) names terminating or substantially reducing heat, water or electricity as retaliatory constructive eviction. Under § 100.20(5), you can sue for twice your pecuniary loss plus costs and attorney fees.

Is a lease clause letting my landlord evict me for calling police enforceable?

No. ATCP 134.08(1) makes the whole rental agreement void and unenforceable if it allows a rent increase, service cut, possession action, nonrenewal or threat because you contacted law enforcement, health or safety services.

Start by saving your code complaint and any notice the landlord sent afterward, then compare your rights in our tenant protection laws by state hub and our Wisconsin security deposit law guide. This page is general information, not legal advice; the LSC get legal help finder lists Wisconsin legal aid programs.

Sources

• Wis. Stat. § 704.45, Retaliatory conduct in residential tenancies prohibited
• Wis. Stat. § 704.07, Repairs; untenantability
• Wis. Admin. Code ATCP 134.09, Prohibited practices
• Wis. Admin. Code ATCP 134.08, Prohibited rental agreement provisions
• Wis. Admin. Code ch. ATCP 134 (full chapter with notes)
• Wis. Stat. § 100.20, Methods of competition and trade practices
• Wis. Stat. § 106.50, Open housing
• Legal Services Corporation: Get Legal Help