WI SB247

Political subdivisions with zoning ordinances must allow at least one accessory dwelling unit (ADU) by right on any parcel where single-family or multi-family residential use is permitted by right

Local governments cannot charge special fees for ADUs beyond standard building permit fees, impose additional parking requirements, require separate utility connections, or apply design/dimensional standards to ADUs that don't apply to single-family homes

ADU size may be limited to no more than 75% of the existing single-family dwelling's square footage on the same parcel

Deed covenants, restrictions, or conditions that prohibit or unreasonably restrict ADU construction, maintenance, or use are declared void and unenforceable

Homeowners associations cannot restrict ADUs except for rules necessary to protect public health and safety; these provisions apply retroactively to existing HOA rules and deed restrictions