Wisconsin Senate Bill SB247

Wisconsin 2025-2026 Regular Session

• Introduced: 5/9/25
• Refer: 5/9/25

Caption

Local and private regulation of accessory dwelling units. (FE)

Impact

The bill restricts political subdivisions from imposing fees beyond standard building permit fees when adding an ADU, and it prevents them from establishing design or dimensional requirements that differ from those placed on single-family dwellings. Furthermore, local governments cannot enforce additional parking standards or require separate utility connections specifically for ADUs. Such provisions aim to streamline the process of constructing ADUs, making it easier for homeowners and contributing to increased housing availability.

Summary

Senate Bill 247 is designed to regulate the use of accessory dwelling units (ADUs) in Wisconsin. The bill mandates that political subdivisions with zoning ordinances must allow at least one ADU on each parcel that is permitted for single-family or multi-family residential use. This legislative move is part of a broader strategy to address housing shortages and support diverse housing options while simplifying the process for homeowners wishing to add ADUs on their properties.

Contention

Key points of contention surround the implications of this bill for local governance and residential community aesthetics. While supporters argue that it fosters housing affordability and diversification, critics raise concerns about potential overdevelopment and the erosion of local control in matters of zoning and community character. The bill ensures that any existing covenants that prohibit or unreasonably restrict the construction of ADUs are declared void and unenforceable, which could lead to conflicts with homeowners associations that traditionally impose such restrictions.