Cost to build accessory dwelling unit — Ann Arbor, MI
Last updated: September 24, 2026
What affects the price
Building an ADU involves several moving parts that shape your total budget. The biggest factor is whether you choose a prefabricated unit or a custom build on-site. Site preparation is also significant; if your land requires extensive grading, utility trenching, or foundation work, costs will climb. Your choice of finishes—like kitchen cabinetry, flooring, and siding materials—also shifts the bottom line. We help you navigate these variables to find a setup that fits your property. Exact pricing confirmed free on the call.
About this service
When calculating the budget for a secondary unit, consider the costs for architectural design, permits, materials, and labor. Custom designs and high-end interior finishes will push your budget higher, while standardized layouts can keep costs more predictable. Exact pricing confirmed free on the call.
Frequently asked in Ann Arbor
What is a prefabricated accessory dwelling unit?
Can I build an accessory dwelling unit in New Hampshire if I live in Ann Arbor?
Building an accessory dwelling unit in New Hampshire would require adherence to that state's specific laws and local ordinances. If you are in Ann Arbor, Michigan, you must follow Michigan and Ann Arbor's regulations. ADU rules differ significantly by location. It's essential to engage professionals who are knowledgeable about the specific jurisdiction where you plan to build.
What is an accessory dwelling unit?
How can I finance an accessory dwelling unit in Ann Arbor?
What is the ADU cost in Ann Arbor?
What's involved in ADU construction in Ann Arbor?
What is an accessory dwelling unit for rent?
Also serving nearby: Livonia · Dearborn · Detroit · Warren · Sterling Heights
More on this: HUD ADU resources — ADU policy and financing research.
Service area details
Serving all of Ann Arbor — population 119,381; about 4,213 residents per square mile across 28.3 sq mi. ZIP codes covered include 48103, 48104, 48105, 48106, 48107, 48108, 48109, 48113.
Neighborhoods served in Ann Arbor: Dixboro, Kerrytown, Maplewood, North Maple, Geddes Heights — and every surrounding area.
Areas we serve
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