Can I Build Tiny Home in Madison, WI? (2026)
Find out if you can build a tiny home in Madison, WI. Rules, permit requirements, costs, and next steps.
Tiny homes on permanent foundations are allowed in Madison, WI. Tiny homes on wheels are not permitted as permanent dwellings.
A tiny home is a small dwelling unit — typically under 400 sq ft — that can be built on a permanent foundation or on wheels. In Madison, WI, the rules differ significantly depending on whether the structure is on a permanent foundation (treated as a dwelling unit under building code) or on wheels (treated as a recreational vehicle under vehicle code). Tiny homes on permanent foundations must meet a minimum size of 150 sq ft in Madison.
Tiny Home Rules in Madison
Tiny Home Rules in Madison: Foundation-based tiny homes: Permitted. Tiny homes on wheels (THOWs): Not permitted as permanent dwelling — classified as recreational vehicle. Minimum size: 150 sq ft. Madison allows tiny homes on permanent foundations meeting Madison Building Code minimums. Tiny homes on wheels (THOWs) are classified as recreational vehicles and cannot serve as permanent dwellings. Madison's housing affordability crisis, driven by UW-Madison student demand, has generated significant interest in micro-units and tiny homes. Madison's progressive zoning has created by-right approval paths for small-footprint ADUs that function similarly to tiny homes.
Costs & Fees
Building permit fees for tiny homes in Madison follow the same schedule as other new construction. Contact the Madison Building Inspection Division at (608) 266-4551 for current fee information.
Next Steps
Next steps for building a tiny home in Madison: 1. Determine foundation vs. wheeled — the rules are fundamentally different. 2. For foundation tiny homes, obtain a building permit from the Madison Building Inspection Division. 3. For wheeled tiny homes, verify whether your property allows RV siting. 4. Check if your tiny home could qualify as an ADU on your property.
Madison Building Inspection Division
Phone: (608) 266-4551
Website: https://www.cityofmadison.com/building-inspection
Online Permits: https://www.cityofmadison.com/building-inspection/permits
Frequently Asked Questions
Can I build an ADU near the UW-Madison campus?
Yes — and Madison makes it particularly easy in urban transect zones (TR-U1, TR-U2) near campus. In these zones, ADU approval is by-right (no discretionary review), no additional parking is required, and setbacks are minimal. Detached ADUs up to 1,000 sqft are permitted. Madison's ADU program is among the most progressive in the Midwest, designed in part to address the intense student rental housing demand around the University of Wisconsin campus.
What is Madison's transect zoning system?
Madison replaced traditional Euclidean zoning with a form-based transect code in 2013 under Chapter 28. The transect ranges from TR-C1 (countryside, lowest density) to TR-U2 (urban core, highest density). Each zone reflects an urban-to-rural intensity gradient — the higher the zone designation, the more urban the character and the more flexibility for mixed uses, reduced parking, and denser development. You can find your property's transect zone on the Madison zoning map at cityofmadison.com/dpced/planning/zoning.
Does Madison require parking for ADUs?
No — in Madison's urban transect zones (TR-U1 and TR-U2), no additional parking is required for an ADU. This is one of the most progressive ADU parking policies in the Midwest. In suburban transect zones (TR-C3, TR-C4), one parking space may be required. Madison has actively reduced parking requirements city-wide to encourage density and transit use.
What are the Dane County Farmers Market and cottage food rules in Madison?
The Dane County Farmers Market on Capitol Square is one of the nation's largest producers-only markets — vendors must grow or produce what they sell. Wisconsin Cottage Food Law (WI Stat. 97.29) allows home-based food production up to $20,000 annual revenue without a permit. In-person sales only — Wisconsin does not allow online cottage food sales. No state permit required. Madison does not add a local cottage food permit requirement. Permitted products include baked goods, jams, jellies, candy, and similar non-hazardous items.
My property is near Lake Mendota — are there extra restrictions?
Yes. Properties within 300 feet of Lake Mendota and other navigable waterways in Madison are subject to the Wisconsin DNR Shoreland Overlay regulations. These rules impose: minimum 75 ft shoreline setback for structures, impervious surface limits (typically 15-30% of the shoreland area), and vegetation preservation requirements within 35 ft of the ordinary high-water mark. These restrictions apply in addition to city zoning rules. Contact Madison Planning at (608) 266-4635 for a shoreland consultation before starting any project near the lakes.
Source: Madison Building Inspection Division — Building Regulations. Last verified April 6, 2026. View source