ADU rules in Milwaukee, WI β also called accessory dwelling unit regulations or granny flat ordinances β cover setbacks, owner-occupancy, parking, and permit requirements.
Milwaukee allows 1 ADU per lot with a single- or two-family home under MCO Chapter 295. Owner-occupancy required for the principal unit. Detached ADU: min 1.5 ft side, 4 ft rear setbacks.
Milwaukee's zoning code (MCO Chapter 295, Chapter 240 for 1-2 family) allows one ADU per residential lot. The principal dwelling owner must occupy the property as a primary residence. Detached ADUs require minimum 1.5-foot side setbacks and 4-foot rear setbacks (reducible to 1.5 feet under certain conditions). Maximum height per district height limits in Table 295-605-2. Building permits required for all ADU construction or conversion.
Operating an ADU without owner occupancy or required permits may result in zoning enforcement action.
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Side-by-side rule comparisons with other cities in Milwaukee County.
See how other cities in Milwaukee County handle adu rules.
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