Accessory dwelling unit construction 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
The cost of building an ADU depends on your choice of materials, the square footage, and whether you are doing a garage conversion or a new detached build. Site access and utility upgrades also play a big role in the final bill. Exact pricing confirmed free on the call.
Frequently asked in Ann Arbor
What accessory dwelling unit services are offered?
What is involved in ADU construction in Ann Arbor?
Are there accessory dwelling unit rentals available?
While we focus on building accessory dwelling units, many Ann Arbor homeowners create them for rental income. You can often find ADUs for rent by checking local real estate listings. If you're looking to build a unit for rental purposes, we can help with the design and construction.
What are modular accessory dwelling units?
Modular accessory dwelling units are built in sections off-site in a factory setting. These modules are then transported to your Ann Arbor property and assembled. This method can speed up construction and ensure consistent quality. We can help you explore if a modular ADU is a good fit for your needs.
What is ADU building?
Are there accessory dwelling unit grants in Ann Arbor?
Grant availability for accessory dwelling units can fluctuate. We can help you research potential programs that might be available in Ann Arbor or Washtenaw County. Understanding eligibility requirements is key. Let's discuss your project and any potential funding avenues.
What is a detached accessory dwelling unit?
A detached accessory dwelling unit (DADU) is a standalone structure on your property, separate from your main home. In Ann Arbor, these are often built in backyards or as additions above garages. DADUs provide significant privacy and can be customized to fit your property's aesthetic. We manage their construction.
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: Kerrytown, South University, Geddes Heights, Maple Ridge — and every surrounding area.
Areas we serve
Browse by state, then city.