In April 2026, Wisconsin enacted 2025 Wisconsin Act 235, creating a new category of Tax Incremental Districts (TIDs) specifically designed to support residential housing development.

The legislation authorizes cities and villages — and certain towns with sewer service — to establish Residential Tax Incremental Districts (Residential TIDs) to finance infrastructure and development costs associated with owner-occupied housing projects.

The law represents a significant shift in Wisconsin’s long-standing tax increment financing framework, which historically focused on industrial, mixed-use, or blighted redevelopment projects. By establishing a dedicated residential TID model, the legislature aimed to address housing shortages, improve housing affordability, and encourage the construction of smaller-lot owner-occupied homes.

What Act 235 Does

Act 235 creates Section 66.1105(21) of the Wisconsin Statutes, establishing a statutory framework for Residential TIDs. The law permits municipalities to create a TID exclusively for qualifying residential development projects.

Under the statute, a municipality may create a Residential TID only if:

• The governing body adopts a formal resolution establishing the district.
• The Joint Review Board approves the district.
• The project plan complies with specific residential development standards.
• All project costs are limited to eligible infrastructure and administrative expenses.
• The city establishes development fee limits and architectural standards for qualifying developments.

The legislation also specifically authorizes certain towns operating sewer systems or sanitary districts to exercise the same authority as cities in creating Residential TIDs.

Purpose of Residential TIDs

Wisconsin communities have increasingly identified workforce housing shortages and rising housing costs as barriers to economic growth. Traditional TIDs were often poorly suited for residential subdivisions because existing law-imposed limitations on using tax increment financing for residential development. Act 235 addresses this challenge by allowing municipalities to use future property tax increments generated by new housing developments to pay for the public infrastructure needed to support those developments.

Examples include:

• Roads
• Utilities
• Sewer and water infrastructure
• Stormwater systems serving the district
• Professional and organizational costs related to the project

The legislation attempts to lower housing development costs while encouraging modestly sized owner-occupied housing.

Key Development Requirements

One of the most notable elements of Act 235 is its extensive set of design and development standards.

To qualify, developments within a Residential TID must consist entirely of:

• Single-family residences, or
• Two-family residences,
• and all units must be owner-occupied.

The law also imposes size restrictions designed to encourage smaller and more affordable housing:

• Single-family lots must be smaller than 7,500 square feet.
• Two-family lots may not exceed 12,500 square feet.
• Single-family lot widths may not exceed 70 feet.
• Two-family lot widths may not exceed 80 feet.
• Side setbacks may not exceed 10 feet.
• Single-story homes may not exceed 1,500 square feet.
• Two-story homes may not exceed 2,000 square feet.

These standards reflect a deliberate policy choice favoring compact neighborhood development and moderate-sized homes.

Financial Limitations and Safeguards

Act 235 places important limits on Residential TIDs to prevent excessive reliance on tax increment financing.

3% Equalized Value Cap: Unlike traditional TIDs, which are generally subject to Wisconsin’s 12% equalized value test, Residential TIDs are subject to a separate 3% cap. The total equalized value of all Residential TIDs within a municipality may not exceed 3% of the municipality’s total equalized property value.

If the Wisconsin Department of Revenue determines that a municipality exceeds this limit, the municipality must either:

1. Rescind the district approval, or
2. Remove parcels from the district to regain compliance.

Restricted Project Costs: Eligible project costs are limited primarily to infrastructure and financing costs. Municipalities may not use Residential TIDs for broad redevelopment activities commonly associated with traditional TIDs.

Eligible costs include:

• Infrastructure improvements
• Utility extensions
• Financing costs
• Administrative and professional service expenses
• Stormwater improvements serving the broader district

The law specifically excludes improvements benefiting individual lots.

Developer Financing Structure: Act 235 also encourages developer participation by permitting projects to be financed directly by developers, with reimbursement occurring through tax increments generated by the development.  The community creating the Residential TID cannot borrow or fund through existing sources any infrastructure improvements.

Duration of Residential TIDs

Residential TIDs created under Act 235 may remain active for up to 20 years, consistent with other qualifying Wisconsin TIDs. Municipalities may request a three-year extension from the Joint Review Board if the district cannot retire its project costs within the original timeline. The legislation also preserves certain timing extensions previously available under Wisconsin TID law.

Important Restrictions

The statute includes several limitations intended to distinguish Residential TIDs from conventional TIDs.

Residential TIDs:

• May not become donor districts.
• May not receive revenue from donor districts.
• Are exempt from portions of the traditional blight and suitability findings that apply to standard TIDs.

The law also limits amendments increasing project costs during the final ten years of a district unless unanimously approved by the Joint Review Board.

Potential Impacts on Wisconsin Communities

Supporters of Act 235 argue that the legislation provides municipalities with an important tool to address housing needs without direct increases in local taxes. By using future tax growth generated from development itself, communities may be able to finance infrastructure that otherwise would delay or prevent residential projects.

The act may be especially useful for:

• Fast-growing suburban communities
• Rural communities experiencing workforce shortages
• Municipalities seeking starter-home development
• Senior housing developments
• Areas where infrastructure costs create barriers to new housing

Critics, however, may raise concerns about long-term impacts on overlapping taxing jurisdictions such as school districts and counties, since property tax growth within a TID is temporarily diverted from the normal tax base.

Others may question whether the statutory design standards are too restrictive or whether the law favors a narrow type of housing development.

Next Steps

Wisconsin Act 235 takes effect on October 1, 2026. Communities should start planning for this new development tool.  First, communities need to determine if there is a market for this type of housing in their community.  If it is determined to be feasible, the community should identify potential developers that may want to invest in this type of project and develop a “pre-TID” development agreement.  While the creation process for the Residential TID has not been identified, the normal process for the creation of a TID is 3-6 months.

Conclusion

Wisconsin Act 235 represents a major expansion of Wisconsin’s tax increment financing framework into the housing sector. By creating Residential TIDs, the legislature has provided municipalities with a new mechanism to encourage owner-occupied housing development while attempting to maintain financial accountability and housing affordability goals.

As communities begin implementing the law, Residential TIDs could become an important economic development and housing policy tool across Wisconsin, particularly in communities struggling to meet growing housing demand.