Backyard accessory dwelling unit — Madison, WI
Last updated: September 24, 2026
What affects the price
Building an ADU is a major project, and the final bill depends on a few key things. Site prep is a big factor; if your land is sloped or needs extensive utility connections, costs go up. The materials you choose—from siding to kitchen finishes—also change the math significantly. Whether you’re building a detached unit or converting an existing garage shifts the permit requirements and structural work needed. We provide exact pricing confirmed free on the call.
About this service
This is a standalone structure built on your property, separate from your main house. People usually build these when they have extra yard space and want to create a private living area for family members or a home office. Factors like site accessibility, utility connections, and foundation type move the price up or down. Exact pricing confirmed free on the call.
Frequently asked in Madison
What is the process for an accessory dwelling unit permit in Madison?
How do I find an ADU company in Madison?
To find an ADU company in Madison, seek out professionals with a strong understanding of Dane County's zoning laws and building codes. Look for companies that have a portfolio of successfully completed ADU projects in the area and can provide references. Verify their licenses and insurance. We can help you identify reputable ADU companies serving Madison.
What accessory dwelling unit services are available in Madison?
What are the options for accessory dwelling unit financing in Madison?
What does accessory dwelling unit mean in Madison?
Where can I find accessory dwelling unit builders near me in Madison?
What is involved in accessory dwelling unit construction in Madison?
Also serving nearby: Rockford · Milwaukee · Kenosha · Elgin · Waukegan
More on this: HUD ADU resources — ADU policy and financing research.
Service area details
Serving all of Madison — population 280,305; about 3,373 residents per square mile across 83.1 sq mi. ZIP codes covered include 53701, 53702, 53703, 53704, 53705, 53706, 53707, 53708.
Neighborhoods served in Madison: Downtown Madison, The Isthmus, Capitol Square, Monona Bay, Nakoma — and every surrounding area.
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