Accessory dwelling unit cost — 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
Pricing for an ADU is driven by the quality of finishes, the foundation type, and the complexity of your site’s terrain. Projects on flat, accessible lots are generally more affordable than those requiring significant grading or utility trenching. Exact pricing confirmed free on the call.
Frequently asked in Ann Arbor
What is involved in ADU building in Ann Arbor?
What are the services offered for ADU housing in Ann Arbor?
Are there accessory dwelling unit companies in Ann Arbor?
What are accessory dwelling unit grants in Ann Arbor?
Can I get an ADU estimate for my Ann Arbor property?
Where can I find accessory dwelling unit near me in Ann Arbor?
What is a detached accessory dwelling unit in Ann Arbor?
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: Old West Side, Kerrytown, South University, North Campus, Geddes Heights — and every surrounding area.
Areas we serve
Browse by state, then city.