Milwaukee Zoning & Permits
Zoning rules, permit requirements, and building codes for Milwaukee, WI. Source-cited from official municipal code.
Quick Facts
Population
577,222
Total Zone Types
26
Planning Department
Milwaukee City Planning Commission / Department of City Development
Zoning Map
Interactive online map
County
Milwaukee County
Metro Area
Milwaukee-Waukesha-Port Washington
Milwaukee Zoning System
The Milwaukee zoning system includes 26 total zone classifications: 7 residential zones (RT1, RT2, RT3, RT4, RM1, and others) and 6 commercial zones (LB1, LB2, GO1, C1, and others), as well as 2 mixed-use zones (MIX1, MIX2) and 3 industrial zones (IL1, IL2, IH). Milwaukee's zoning is governed by Chapter 295 of the Milwaukee Code of Ordinances — the Zoning Code — last comprehensively updated in 2015 through a major overhaul that replaced the former Chapter 295 with a new form-based approach called the Milwaukee Zoning Code (MZC). Residential zones use a two-tier system: RT (Residential Two-flat) zones for single-family and duplex development, and RM (Residential Multifamily) zones for larger multifamily buildings. Milwaukee's housing stock is dominated by its iconic 'Polish Flat' architectural type — a two-story structure with a flat front where the main floor of the house is elevated above a ground-floor apartment. This Polish Flat tradition means Milwaukee has historically been a city of two-family homes, making it naturally ADU-friendly in character. Milwaukee's neighborhoods reflect its industrial and ethnic heritage: Walker's Point (Hispanic), Brewer's Hill (historic Black neighborhood), and Bay View (gentrifying lakefront). The city maintains an interactive zoning map for property lookup.
View Milwaukee Zoning Map (interactive online map)
Building & Planning Departments
The Milwaukee Building Department (Milwaukee Department of Neighborhood Services (DNS)) handles all building permit applications, inspections, and code enforcement. You can reach them by phone at (414) 286-2268 or apply online through their permit portal. Office hours: Mon-Fri 7:45am-4:30pm. For zoning questions and land use determinations, contact the Milwaukee City Planning Commission / Department of City Development at (414) 286-5700. Zoning information is available online. Always verify current requirements directly with the department before beginning any project, as regulations and fees may have changed since this data was last verified.
Planning Department
Milwaukee City Planning Commission / Department of City Development
(414) 286-5700
Visit WebsiteFrequently Asked Questions
What is a Polish Flat and how does it affect ADU rules in Milwaukee?
A Polish Flat is a distinctive Milwaukee architectural type — a two-story house where the main living floor is elevated above a lower-floor apartment, with the front foundation visible between the ground and the elevated porch. This type was developed by Milwaukee's Polish immigrant community in the early 1900s as a built-in ADU. Many Milwaukee properties already function as two-family homes because of this tradition. If your Polish Flat has a lower-floor unit, it may require proper permitting and a Milwaukee rental housing license to legally operate as a rental.
Can I rent out a room or my whole home short-term (Airbnb) in Milwaukee?
Yes. Milwaukee requires a Short-Term Rental License ($150/year) for rentals under 30 consecutive days. Wisconsin Act 59 of 2017 prevents Milwaukee from banning STRs of 7 or more consecutive days outright, though Milwaukee may impose licensing requirements, safety standards, and density limits. Wisconsin state sales tax (5%) applies to STR revenues. Contact Milwaukee DNS or the City Clerk for current licensing requirements.
Can I build an ADU (carriage house or in-law suite) in Milwaukee?
Yes. Milwaukee's Zoning Code allows detached ADUs (often called carriage houses) of up to 900 sqft in the rear yard of residential properties. One parking space is required unless you're near a transit corridor. No owner-occupancy requirement. A building permit from Milwaukee DNS is required, and occupied rental units need a Milwaukee rental housing license. Contact Milwaukee DNS at (414) 286-2268.
What is Wisconsin Act 59 and how does it affect Milwaukee STRs?
Wisconsin Act 59, enacted in 2017, partially preempts local short-term rental bans. It prohibits Wisconsin municipalities (including Milwaukee) from completely banning short-term rentals of 7 or more consecutive days in residential zones. Milwaukee can still regulate STRs through licensing, density limits, safety requirements, and fire code compliance — it just cannot impose an outright ban on 7-night-or-longer rentals. Rentals shorter than 7 nights retain more local regulatory flexibility.
What permits are needed to convert a Milwaukee basement into a legal apartment?
Converting a Milwaukee basement or lower-floor unit to a legal apartment requires a building permit from Milwaukee DNS for the construction/renovation work (electrical, plumbing, egress windows, ceiling height compliance), plus a Milwaukee Rental Housing License for the occupied unit. Minimum ceiling height for habitable space is typically 7 ft. Egress windows are required for basement bedrooms. Fire separation between units may be required. Contact Milwaukee DNS at (414) 286-2268 for a pre-application meeting.
Source: Milwaukee Code of Ordinances Chapter 295 (Zoning Code); Milwaukee Building Code. Last verified April 6, 2026. View source