What’s new in Wisconsin TIF: Key changes under Acts 173 and 235

Wisconsin’s 2025-2026 legislative session has introduced notable updates to tax incremental financing (TIF), including targeted reforms to affordable housing tools and the creation of a new TIF district type to spur residential development.

2025 Wisconsin Act 173

Affordable Housing Extension Expanded. Municipalities can now extend a TIF district’s life by up to two years (a doubling of the previous one-year limit) to fund costs benefiting affordable housing. All other statutory requirements to implement the extension remain unchanged....

2025 Wisconsin Act 235

Creation of Residential TIDs. Act 235 authorizes a new TID type that allows newly platted residential development without the 35 percent area cap in Mixed-Use districts.  

Development in a Residential TID must meet the following requirements:

• Limited to owner-occupied, single-family or two-family residences.
• Lot sizes for single-family residences may not exceed 7,500 square feet, with a maximum lot width of 70 feet and a maximum 10-foot side yard setback.
• Lot sizes for two-family residences may not exceed 12,500 square feet, with a maximum lot width of 80 feet and a maximum 10-foot side yard setback.
• No single-story residence can be larger than 1,500 square feet.
• No two-story residence can be larger than 2,000 square feet...

   ...more

Leo's notes: These reforms represent one of the most meaningful housing policy changes Wisconsin has enacted in recent years. While tax credits and grants often receive the most attention, local infrastructure costs frequently determine whether housing projects move forward. By expanding affordable housing TIF tools and creating Residential TIDs focused on smaller homes, Wisconsin is providing communities with new mechanisms to support starter homes and workforce housing. The real test will be whether municipalities embrace these tools proactively and align zoning, land-use planning, and infrastructure investments to convert policy changes into actual housing production.

Ken Notes: We are getting closer to addressing the issues. Would still like to see provisions for public amenities and quality urban design and review. We need to build neighborhoods not just houses...