Accessory Dwelling Unit (ADU) Construction in Ann Arbor, MI — Costs $68,320 to $398,533
What does accessory dwelling unit (adu) construction cost in Ann Arbor? Average $170,800, ranging $68,320–$398,533. Labor runs $36.22/hr locally — 14% above the national average. Free breakdown with material + labor split.
Ann Arbor, MI Market
+14% vs nationalLabor Rate
$36.22/hr
Material Index
107
Avg Permit Cost
$1,435
Median Home Price
$208,115
Ann Arbor is a mid-sized city in Michigan with a healthy pool of local contractors. Homeowners generally have several options to compare for a accessory dwelling unit (adu) construction, which helps keep pricing competitive. Costs in Ann Arbor run slightly above the national average, though the gap is modest enough that smart material choices and timing can close it. At a median home price of $208,115, homeowners in Ann Arbor should weigh the project cost (82.1% of home value) carefully against expected returns to avoid over-improving for the local market.
Low Estimate
$68,320
National: $60,000
Mid-Range
$170,800
National: $150,000
High End
$398,533
National: $350,000
Per Sq Ft
$285
National: $250
Accessory Dwelling Unit (ADU) Construction Cost Calculator for Ann Arbor
Adjusted for Ann Arbor's labor rate ($36.22/hr) and material costs (index 107).
Mid-grade materials, good quality fixtures, standard options.
Estimated Total in Ann Arbor
$170,800
Based on 200 sq ft at mid quality, adjusted for Ann Arbor market rates.
Local Cost Breakdown
At Ann Arbor's average rate of $36.22/hr (21% above national avg)
Material cost index 107 (7% above national baseline of 100)
Accessory Dwelling Unit (ADU) Construction vs. Home Value in Ann Arbor
| Metric | Ann Arbor | National Avg |
|---|---|---|
| Accessory Dwelling Unit (ADU) Construction (Mid-Range) | $170,800 | $150,000 |
| Median Home Price | $208,115 | $350,000 |
| Project as % of Home Value | 82.1% | 42.9% |
| Estimated ROI | 80% | 80% |
| Median Household Income | $62,859 | $75,000 |
What Affects the Price in Ann Arbor
- 1Local labor rates ($36.22/hr in Ann Arbor)
- 2Material cost index (107 vs national 100)
- 3Attached vs detached
- 4Size and bedroom count
- 5Kitchen and bath quality
- 6Local ADU regulations
Popular Upgrades
- Full kitchen
- Separate entrance
- Solar panels for energy independence
Other Projects in Ann Arbor, MI
Second Story Addition
$227,733
Room Addition
$102,480
Swimming Pool Installation
$73,121
Garage Addition
$62,627
Home Addition
$90,544
Inground Swimming Pool
$72,674
Attic Conversion
$63,004
Swimming Pool Construction
$57,277
Accessory Dwelling Unit (ADU) Construction in Other Michigan Cities
Detroit, MI
$179,650
Grand Rapids, MI
$161,575
Warren, MI
$147,025
Sterling Heights, MI
$144,900
Lansing, MI
$142,100
Dearborn, MI
$146,250
Clinton Township, MI
$174,350
Canton Township, MI
$171,750
Planning a Accessory Dwelling Unit (ADU) Construction in Ann Arbor
Building permits are typically required for a accessory dwelling unit (adu) construction in Ann Arbor. The average permit fee in this area is $1,435, though costs vary based on project scope. Permit fees in this market are above average — factor them into your total budget. Plan for 6-18 months from start to finish.
A accessory dwelling unit (adu) construction is a complex project best left to licensed professionals. In Ann Arbor, skilled contractors charge an average of $36.22/hr, and the specialized nature of this work means cutting corners on labor can lead to costly rework.
For the median Ann Arbor household earning $62,859/year, this project at $170,800 represents a significant investment. Consider financing options or phasing the work to spread costs over time.
Accessory Dwelling Unit (ADU) Construction — National Guide
See the full national cost guide with DIY tips, cost factors, and ROI analysis.
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